diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/README.md b/keyboards/keebio/levinson/keymaps/issmirnov/README.md
new file mode 100644
index 000000000..1e03e58e7
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/README.md
@@ -0,0 +1,15 @@
+# Levinson
+
+## Colors
+
+- https://github.com/qmk/qmk_firmware/blob/master/docs/feature_rgblight.md
+  - main docs.
+- https://github.com/qmk/qmk_firmware/blob/master/quantum/rgblight_list.h
+  - list of colors
+- https://github.com/qmk/qmk_firmware/blob/master/quantum/rgblight.h
+  - list of functions for RGB manipulation
+
+## Troubleshooting
+
+- When in doubt, flash both sides of the keyboard. For some reason that helps with LEDs and reponsiveness.
+    - `cd qmk_firmware && make keebio/levinson/rev2:issmirnov:dfu-split-right`
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/asci-keymap.txt b/keyboards/keebio/levinson/keymaps/issmirnov/asci-keymap.txt
new file mode 100644
index 000000000..aa5bd08b3
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/asci-keymap.txt
@@ -0,0 +1,55 @@
+                                   Qwerty                                    
+,-----------------------------------.   ,-----------------------------------.
+| Esc |  Q  |  W  |  E  |  R  |  T  |   |  Y  |  U  |  I  |  O  |  P  |⌘ + d|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+| Tab |  A  |  S  |  D  |  F  |  G  |   |  H  |  J  |  K  |  L  |TapTo|Mo(Na|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|⇧(1) |  Z  |  X  |  C  |  V  |  B  |   |  N  |  M  |  .  |Comma|Tg(Nu|  '  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|Ctrl | ⌘⇧  | Alt | Mod |  ⌫  | Spc |   |Enter| Tab |  ↑  |  ↓  |  ←  |  →  |
+`-----------------------------------'   ------------------------------------'
+
+                                    Symb                                     
+,-----------------------------------.   ,-----------------------------------.
+|     |  -  |  @  |  {  |  }  |  `  |   |  *  |  !  |  |  |  %  |  +  | Esc |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |  ^  |  _  |  (  |  )  |  $  |   |  #  |  =  |  :  |  ;  |TapTo|  "  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |  <  |  >  |  [  |  ]  |  ~  |   |  &  |  ?  |  /  |  \  |Tg(Nu|  '  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |     |     |     |     |   |     |     | Esc |  :  |  %  |  🔒  |
+`-----------------------------------'   ------------------------------------'
+
+                                    Nump                                     
+,-----------------------------------.   ,-----------------------------------.
+|     | No  | No  |Lgui(|     |     |   |  ,  |  7  |  8  |  9  |     |Reset|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |Lgui(|Lgui(|Lgui(|     |   |  0  |  4  |  5  |  6  |To(Sy|     |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |     |     |Audio|Audio|   |  .  |  1  |  2  |  3  |To(Qw|     |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |     |     |     |     |   |     |     |     |     |To(Ov|     |
+`-----------------------------------'   ------------------------------------'
+
+                                  Overwatch                                  
+,-----------------------------------.   ,-----------------------------------.
+| Tab |  Q  |  W  |  E  |  R  |  T  |   |To(0)|     |     |     |     |Clear|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|Ctrl |  A  |  S  |  D  |  F  |  P  |   |RgbMo|RgbMo|RgbVa|RgbVa|     |RgbTo|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|Lshif|  Z  |  X  |  C  |  V  |Grave|   |RgbMo|RgbMo|RgbMo|RgbMo|RgbMo|RgbMo|
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|Ctrl | F9  |Pscre|  H  |  R  |  ⎵  |   |RgbHu|RgbHu|RgbSa|RgbSa|RgbMo|RgbMo|
+`-----------------------------------'   ------------------------------------'
+
+                                    Navi                                     
+,-----------------------------------.   ,-----------------------------------.
+|     |     |     |  ↑  |     |     |   |     |     |     |     |     |     |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |  ←  |  ↓  |  →  |     |   |     |Ctrl |     |     |     |     |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |     |     |     |     |   |     |     |     |     |     |     |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+|     |     |     |     |     |⌘ + d|   | Mod | ⌘⇧  |     |     |     |     |
+`-----------------------------------'   ------------------------------------'
+
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/build.sh b/keyboards/keebio/levinson/keymaps/issmirnov/build.sh
new file mode 100755
index 000000000..d01308391
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/build.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+make keebio/levinson/rev2:issmirnov
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/config.h b/keyboards/keebio/levinson/keymaps/issmirnov/config.h
new file mode 100644
index 000000000..89c2f5ebe
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/config.h
@@ -0,0 +1,34 @@
+#pragma once
+
+// Use serial comms for split keyboard
+// DO NOT enable USE_IDC - board will not respond.
+#define USE_SERIAL
+//#define USE_I2C
+
+#ifdef RGBLIGHT_ENABLE
+   // Enable animations. +5500 bytes
+   #define RGBLIGHT_ANIMATIONS
+
+   // Map my custom number of LED's
+   #undef RGBLED_NUM
+   #define RGBLED_NUM 16
+   #define RGBLIGHT_LED_MAP { 0, 1, 2, 3, 4, 5, 6, 7, 15, 14, 13, 12, 11, 10, 9, 8 } // When changed, BE SURE to flash EEPROM on both halves and clear it.
+
+   // DO NOT USE RGBLED_SPLIT - the slave board will stop responding.
+
+   // Turn off RGB when computer sleeps
+   #define RGBLIGHT_SLEEP
+
+   // custom colors
+   #define RGB_CLEAR 0x00, 0x00, 0x00
+
+   // MOD indicators
+   #define SHFT_LED1 7
+   #define GUI_LED1 8
+#endif
+
+#ifdef AUDIO_ENABLE
+   #define QMK_SPEAKER C6
+   #define C6_AUDIO
+   #define NO_MUSIC_MODE // Save 2000 bytes
+#endif
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c b/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c
new file mode 100644
index 000000000..0023b8424
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/keymap.c
@@ -0,0 +1,124 @@
+#include "tap_tog.h"
+
+#ifdef AUDIO_ENABLE
+  #include "audio.h"
+  #include "sounds.h"
+#endif
+
+
+#ifdef RGBLIGHT_ENABLE
+  #include "rgb.h"
+#endif
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_QWERTY] = LAYOUT_ortho_4x12_wrapper(
+KC_ESC  , _________________QWERTY_L1_________________, _________________QWERTY_R1_________________ , APPS      ,
+KC_TAB  , _________________QWERTY_L2_________________, _________________QWERTY_R2_________________ , MO(_NAVI) ,
+OSMSFT  , _________________QWERTY_L3_________________, _________________QWERTY_R3_________________ , KC_QUOTE  ,
+KC_LCTL , MODSFT , KC_LALT , KC_LGUI , KC_BSPACE , KC_SPC , KC_ENTER , KC_TAB , KC_UP  , KC_DOWN , KC_LEFT       , KC_RGHT
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_SYMB] = LAYOUT_ortho_4x12_wrapper(
+_______ , _________________SYMB_L1___________________, _________________SYMB_R1___________________ , KC_ESC   ,
+_______ , _________________SYMB_L2___________________, _________________SYMB_R2___________________ , KC_DQT   ,
+_______ , _________________SYMB_L3___________________, _________________SYMB_R3___________________ , KC_QUOTE ,
+_______ , ___________________BLANK___________________, _______ , _______ , KC_ESC   , KC_COLN   , KC_PERC       , LOCK
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_NUMP] = LAYOUT_ortho_4x12_wrapper(
+_______ , _________________NUMP_L1___________________ , _________________NUMP_R1___________________ , RESET   ,
+_______ , _________________NUMP_L2___________________ , _________________NUMP_R2___________________ , _______ ,
+_______ , _________________NUMP_L3___________________ , _________________NUMP_R3___________________ , _______ ,
+_______ , ___________________BLANK___________________ , _______ , _______ , _______ , _______ , TO(_OVERWATCH) , _______
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_OVERWATCH] = LAYOUT_ortho_4x12_wrapper(
+______________OVERWATCH_L1_________________ , TO(0)            , XXXXXXX          , XXXXXXX          , XXXXXXX        , XXXXXXX          , EEP_RST           ,
+______________OVERWATCH_L2_________________ , RGB_MODE_FORWARD , RGB_MODE_REVERSE , RGB_VAI          , RGB_VAD        , XXXXXXX          , RGB_TOG           ,
+______________OVERWATCH_L3_________________ , RGB_MODE_PLAIN   , RGB_MODE_BREATHE , RGB_MODE_RAINBOW , RGB_MODE_SWIRL , RGB_MODE_SNAKE   , RGB_MODE_XMAS     ,
+______________OVERWATCH_L4_________________ , KC_SPACE, RGB_HUI          , RGB_HUD          , RGB_SAI          , RGB_SAD        , RGB_MODE_RGBTEST , RGB_MODE_GRADIENT
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+// Run `./qmk show levinson` from parent dir to see this layer.
+[_NAVI] = LAYOUT_ortho_4x12_wrapper(
+XXXXXXX , _________________NAVI_L1___________________ , _________________NAVI_R1___________________ , XXXXXXX ,
+XXXXXXX , _________________NAVI_L2___________________ , _________________NAVI_R2___________________ , XXXXXXX ,
+XXXXXXX , _________________NAVI_L3___________________ , _________________NAVI_R3___________________ , XXXXXXX ,
+XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , APPS    , KC_LGUI , MODSFT  , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
+), // Note: visualizer expects this closing parens to be right at the start of the line.
+
+};
+
+// called by QMK during key processing before the actual key event is handled. Useful for macros.
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  switch (keycode) {
+    case LOCK:
+      if (record->event.pressed) {
+        rgblight_mode(RGBLIGHT_MODE_RAINBOW_SWIRL);
+      }
+      return true; // Let QMK send the press/release events
+      break;
+
+    case TAP_TOG_LAYER:
+      process_tap_tog(_SYMB,record);
+      return false;
+      break;
+    default:
+      tap_tog_count = 0; // reset counter.
+      tap_tog_layer_other_key_pressed = true; // always set this to true, TAP_TOG_LAYER handlers will handle interpreting this
+      break;
+  }
+  return true;
+}
+
+
+// Runs constantly in the background, in a loop every 100ms or so.
+// Best used for LED status output triggered when user isn't actively typing.
+void matrix_scan_user(void) {
+  #ifdef RGBLIGHT_ENABLE
+    matrix_scan_rgb();
+  #endif // RGBLIGHT_ENABLE
+}
+
+// only runs when when the layer is changed, good for updating LED's and clearing sticky state
+// RGB modes: https://github.com/qmk/qmk_firmware/blob/master/quantum/rgblight.h
+uint32_t layer_state_set_user(uint32_t state) {
+  #ifdef RGBLIGHT_ENABLE
+    layer_state_set_rgb(state);
+  #endif
+  uint8_t layer = biton32(state);
+  combo_enable(); // by default, enable combos.
+  switch (layer) {
+    case 0:
+      break;
+    case 1:
+      clear_mods();
+      break;
+    case 2:
+      clear_mods();
+      break;
+    case _OVERWATCH:
+      clear_mods();
+      combo_disable(); // We don't want combos in overwatch
+      #ifdef AUDIO_ENABLE
+        // PLAY_SONG(song_overwatch);
+      #endif
+      break;
+    default:
+      break;
+  }
+  return state;
+};
+
+// Runs boot tasks for keyboard.
+// Plays a welcome song and clears RGB state.
+void matrix_init_user(void) {
+  #ifdef RGBLIGHT_ENABLE
+    keyboard_post_init_rgb();
+  #endif
+}
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/push.sh b/keyboards/keebio/levinson/keymaps/issmirnov/push.sh
new file mode 100755
index 000000000..58eb115f8
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/push.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+make keebio/levinson/rev2:issmirnov:dfu-split-left 
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/rgb.c b/keyboards/keebio/levinson/keymaps/issmirnov/rgb.c
new file mode 100644
index 000000000..de3a5342c
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/rgb.c
@@ -0,0 +1,61 @@
+#include "rgb.h"
+
+// TODO gate this debugging header
+#include <print.h>
+
+// Wired up in layer_state_set_user in keymap.c
+layer_state_t layer_state_set_rgb(layer_state_t state) {
+  switch (get_highest_layer(state)) {
+    case _QWERTY:
+      rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
+      rgblight_sethsv_noeeprom(RGB_CLEAR);
+      break;
+    case _SYMB:
+      rgblight_sethsv_noeeprom_red();
+      break;
+    case _NUMP:
+      rgblight_sethsv_noeeprom_green();
+      break;
+    case _OVERWATCH:
+      rgblight_sethsv_noeeprom_blue();
+      // TODO set up animated rainbow swirl with overwatch colors.
+      // rgblight_mode_noeeprom(RGBLIGHT_MODE_RAINBOW_SWIRL);
+      // rgblight_effect_breathing(&animation_status);
+      // rgblight_mode_noeeprom(RGBLIGHT_MODE_BREATHING + 3);
+      break;
+    case _NAVI:
+      rgblight_sethsv_noeeprom(HSV_AZURE);
+      break;
+    default: //  for any other layers, or the default layer
+      break;
+    }
+  return state;
+}
+
+
+void keyboard_post_init_rgb(void) {
+  rgblight_enable();
+  rgblight_mode(RGBLIGHT_MODE_STATIC_LIGHT);
+  rgblight_setrgb(RGB_CLEAR);
+  uprintf("Reset RGB colors");
+}
+
+void matrix_scan_rgb(void) {
+  set_rgb_indicators(get_mods(), get_oneshot_mods());
+}
+
+void set_rgb_indicators(uint8_t this_mod, uint8_t this_osm) {
+  if (biton32(layer_state) == _QWERTY) {
+    if ((this_mod | this_osm) & MOD_MASK_SHIFT) {
+      rgblight_setrgb_gold_at(SHFT_LED1);
+    } else {
+      rgblight_setrgb_at(RGB_CLEAR, SHFT_LED1);
+    }
+
+    if ((this_mod | this_osm) & MOD_MASK_GUI) {
+      rgblight_setrgb_purple_at(GUI_LED1);
+    } else {
+      rgblight_setrgb_at(RGB_CLEAR, GUI_LED1);
+    }
+  }
+}
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/rgb.h b/keyboards/keebio/levinson/keymaps/issmirnov/rgb.h
new file mode 100644
index 000000000..254d3cbac
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/rgb.h
@@ -0,0 +1,15 @@
+#pragma once
+#include "quantum.h"
+#include "issmirnov.h"
+
+// Welcome animation when keyboard boots
+void keyboard_post_init_rgb(void);
+
+// If rgb enabled, set underglow for layer
+uint32_t layer_state_set_rgb(uint32_t state);
+
+// Enhance matrix scan code. Note: keep this light, since it runs every 100ms
+void matrix_scan_rgb(void);
+
+// Light up SHIFT and GUI indicator when pressed.
+void set_rgb_indicators(uint8_t this_mod, uint8_t this_osm);
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/rules.mk b/keyboards/keebio/levinson/keymaps/issmirnov/rules.mk
new file mode 100644
index 000000000..6cbed2f77
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/rules.mk
@@ -0,0 +1,14 @@
+# Enable RGB underglow
+# https://beta.docs.qmk.fm/features/feature_rgblight
+RGBLIGHT_ENABLE = yes # +5500 bytes
+ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
+  # Include my fancy rgb functions source here
+  SRC	 += rgb.c
+endif
+
+# Disable backlight, since I use RGB underglow.
+# https://beta.docs.qmk.fm/features/feature_backlight
+BACKLIGHT_ENABLE = no
+
+# Control piezo speaker on C6
+AUDIO_ENABLE = yes # +4000 bytes
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/sounds.h b/keyboards/keebio/levinson/keymaps/issmirnov/sounds.h
new file mode 100644
index 000000000..dac9d276c
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/sounds.h
@@ -0,0 +1,9 @@
+// ................................................................ Audio Sounds
+#pragma once
+#ifdef AUDIO_ENABLE
+// Songs come from quantum/audio/song_list.h
+float song_startup  [][2] = SONG(STARTUP_SOUND);
+float song_goodbye  [][2] = SONG(GOODBYE_SOUND);
+float song_overwatch[][2] = SONG(OVERWATCH_THEME);
+#undef AUDIO_VOICES
+#endif
diff --git a/keyboards/keebio/levinson/keymaps/issmirnov/template.txt b/keyboards/keebio/levinson/keymaps/issmirnov/template.txt
new file mode 100644
index 000000000..8787cee7b
--- /dev/null
+++ b/keyboards/keebio/levinson/keymaps/issmirnov/template.txt
@@ -0,0 +1,9 @@
+,-----------------------------------.   ,-----------------------------------.
+| 0   | 1   | 2   | 3   | 4   | 5   |   | 6   | 7   | 8   | 9   | 10  | 11  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+| 12  | 13  | 14  | 15  | 16  | 17  |   | 18  | 19  | 20  | 21  | 22  | 23  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+| 24  | 25  | 26  | 27  | 28  | 29  |   | 30  | 31  | 32  | 33  | 34  | 35  |
+|-----+-----+-----+-----+-----+-----|   |-----+-----+-----+-----+-----+-----|
+| 36  | 37  | 38  | 39  | 40  | 41  |   | 42  | 43  | 44  | 45  | 46  | 47  |
+`-----------------------------------'   ------------------------------------'
diff --git a/layouts/community/ergodox/issmirnov/README.md b/layouts/community/ergodox/issmirnov/README.md
new file mode 100644
index 000000000..564edfe31
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/README.md
@@ -0,0 +1,49 @@
+# Ivan's Ergodox Config
+
+
+## Details about the layout
+
+- Shift and Cmd are One Shot Modifiers, so tapping them once will apply them to the next key. When tapped twice they will lock, until tapped again to clear.
+- When switching to other layers, any stuck modifiers are cleared in order to avoid unintended key combos
+- There are a few leader key combinations. Right now, `KC_LEAD` + `s` will open my wiki homepage.
+- All transparent keys have been replaced with noops to avoid layer bleeding.
+
+## Initial Setup
+
+### QMK
+
+```
+brew tap osx-cross/avr
+brew tap PX4/homebrew-px4
+brew update
+brew install avr-gcc
+brew install dfu-programmer
+brew install gcc-arm-none-eabi
+brew install avrdude
+
+git clone https://github.com/qmk/qmk_firmware.git
+git clone https://github.com/issmirnov/ergodox-layout.git \
+            layouts/community/ergodox/ismirnov
+```
+
+### Teensy utils
+
+Download and add both of these to $PATH
+
+- [hid_listen](https://www.pjrc.com/teensy/hid_listen.html)
+- [teensy loader cli](https://www.pjrc.com/teensy/loader_cli.html)
+
+## Flashing
+
+```
+make ergodox_ez:ismirnov
+teensy_loader_cli -mmcu=atmega32u4 -w -v ergodox_ez_ismirnov.hex
+
+# or just
+make ergodox_ez:ismirnov:flash
+```
+
+## Gotchas
+
+- If you get error: `dyld: Library not loaded: /usr/local/opt/isl/lib/libisl.15.dylib` then do `brew reinstall avr-gcc`
+- If `hid_listen` just prints out a ton of dots, update makefile with `CONSOLE_ENABLE = yes`
diff --git a/layouts/community/ergodox/issmirnov/asci-keymap.txt b/layouts/community/ergodox/issmirnov/asci-keymap.txt
new file mode 100644
index 000000000..9b023f664
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/asci-keymap.txt
@@ -0,0 +1,95 @@
+                                              Qwerty                                              
+,--------------------------------------------.      ,--------------------------------------------.
+| Escape |  1  |  2  |  3  |  4  |  5  |  !  |      |  =  |  6  |  7  |  8  |  9  |  0  | Escape |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|Lctl(Spa|  Q  |  W  |  E  |  R  |  T  |  *  |      |  +  |  Y  |  U  |  I  |  O  |  P  |Lgui(Spa|
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|  Tab   |  A  |  S  |  D  |  F  |  G  |-----|      |-----|  H  |  J  |  K  |  L  |TapTo|Mo(Navi)|
+|--------+-----+-----+-----+-----+-----|  /  |      |  -  |-----+-----+-----+-----+-----+--------|
+|Osm(ModL|  Z  |  X  |  C  |  V  |  B  |     |      |     |  N  |  M  |  .  |Comma|Tg(Nu|   '    |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   |Ctrl |Lsft(|Lsft(| Alt | Mod |                              |Escap|  :  |  %  |     |Lgui(|
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   |     |     |  |  ←  |  →  |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     |     |  |  ↑  |     |     |
+                             |  ⎵  |  ⌫  |-----|  |-----| Tab |Enter|
+                             |     |     | Del |  |  ↓  |     |     |
+                             `-----------------'  `-----------------'
+
+                                               Symb                                               
+,--------------------------------------------.      ,--------------------------------------------.
+| Escape | F1  | F2  | F3  | F4  | F5  | F6  |      | F7  | F8  | F9  | F10 | F11 | F12 |        |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|        |  -  |  @  |  {  |  }  |  `  |  *  |      |  +  |  *  |  !  |  |  |  %  |  +  |Mo(Navi)|
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|  Tab   |  ^  |  _  |  (  |  )  |  $  |-----|      |-----|  #  |  =  |  :  |  ;  |TapTo|  Dquo  |
+|--------+-----+-----+-----+-----+-----|  /  |      |  -  |-----+-----+-----+-----+-----+--------|
+| Lshift |  <  |  >  |  [  |  ]  |  ~  |     |      |     |  &  |  ?  |  /  |  \  |Tg(Nu|   '    |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   |Ctrl |Lsft(|Lsft(| Alt |WkspL|                              |Escap|  :  |  %  |     |     |
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   |     |     |  |  ←  |  →  |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     |     |  |  ↑  |     |     |
+                             |WkspR|  ⌫  |-----|  |-----| Tab |Enter|
+                             |     |     | Del |  |  ↓  |     |     |
+                             `-----------------'  `-----------------'
+
+                                               Nump                                               
+,--------------------------------------------.      ,--------------------------------------------.
+|        |     |     |     |     |     |     |      |  =  |     |     |     |     |     | Reset  |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|        | No  | No  |Lgui(|     |     |  *  |      |  +  |  ,  |  7  |  8  |  9  |     |        |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|  Tab   |     |Lgui(|Lgui(|Lgui(|     |-----|      |-----|  0  |  4  |  5  |  6  |To(Sy|        |
+|--------+-----+-----+-----+-----+-----|  /  |      |  -  |-----+-----+-----+-----+-----+--------|
+|        |     |     |     |Audio|Audio|     |      |     |  .  |  1  |  2  |  3  |To(Qw|        |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   |To(0)|     |     |     |     |                              |  0  |     |     |To(3)|     |
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   |     |     |  |  ←  |  →  |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     |     |  |  ↑  |     |     |
+                             |  ⎵  |  ⌫  |-----|  |-----| Alt |Shift|
+                             |     |     | Del |  |  ↓  |     |     |
+                             `-----------------'  `-----------------'
+
+                                            Overwatch                                             
+,--------------------------------------------.      ,--------------------------------------------.
+| Escape |  1  |  2  |  3  |  4  |  5  |To(0)|      |     |     |     |     |     |     |        |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|  Tab   |  Q  |  W  |  E  |  R  |  T  |     |      |     |     |     |     |     |     |        |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|  Ctrl  |  A  |  S  |  D  |  F  |  P  |-----|      |-----|     |     |     |     |     |        |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+| Lshift |  Z  |  X  |  C  |  V  |Grave|     |      |     |     |     |     |     |     |        |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   |Ctrl | F9  |Pscre|  H  |  R  |                              |     |     |     |     |     |
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   |     |     |  |     |     |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     |     |  |     |     |     |
+                             |  ⎵  |     |-----|  |-----|     |     |
+                             |     |     |     |  |     |     |     |
+                             `-----------------'  `-----------------'
+
+                                               Navi                                               
+,--------------------------------------------.      ,--------------------------------------------.
+| Escape |  1  |  2  |  3  |  4  |  5  |  6  |      |     |     |     |     |     |     |        |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|        |     |     |  ↑  |     |     |     |      |     |     |     |     |     |     |        |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|        |     |  ←  |  ↓  |  →  |     |-----|      |-----|     |Ctrl |     |     |     |        |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|        |     |     |     |     |     |     |      |     |     |     |     |     |     |        |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   |     |     |     |     |WkspL|                              | ⌘⇧  |     |     |     |     |
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   |     |     |  |     |     |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     |     |  |     |     |     |
+                             |WkspR|     |-----|  |-----|     | Mod |
+                             |     |     |     |  |     |     |     |
+                             `-----------------'  `-----------------'
+
diff --git a/layouts/community/ergodox/issmirnov/build.sh b/layouts/community/ergodox/issmirnov/build.sh
new file mode 100755
index 000000000..7bb694d8a
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/build.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+make ergodox_ez:issmirnov
diff --git a/layouts/community/ergodox/issmirnov/config.h b/layouts/community/ergodox/issmirnov/config.h
new file mode 100644
index 000000000..fe62a7d1d
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/config.h
@@ -0,0 +1,3 @@
+// Reference: https://beta.docs.qmk.fm/reference/config-options
+// and https://github.com/qmk/qmk_firmware/blob/master/docs/config_options.md
+#include QMK_KEYBOARD_CONFIG_H
diff --git a/layouts/community/ergodox/issmirnov/keymap.c b/layouts/community/ergodox/issmirnov/keymap.c
new file mode 100644
index 000000000..ce853f3d3
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/keymap.c
@@ -0,0 +1,250 @@
+#include QMK_KEYBOARD_H
+
+// Custom user includes
+#include "issmirnov.h"
+#include "tap_tog.h"
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+[_QWERTY] = LAYOUT_ergodox_wrapper(
+KC_ESCAPE,      KC_1,   KC_2,   KC_3,   KC_4,   KC_5,   KC_EXLM,
+LCTL(KC_SPACE), _________________QWERTY_L1_________________,   KC_ASTR,
+KC_TAB,         _________________QWERTY_L2_________________,
+OSM(MOD_LSFT),  _________________QWERTY_L3_________________,   KC_SLASH,
+KC_LCTL, LSFT(KC_LGUI), LSFT(KC_LALT),  KC_LALT,   KC_LGUI,
+                                        XXXXXXX,  XXXXXXX,
+                                                XXXXXXX,
+                        KC_SPACE,   KC_BSPACE,  KC_DEL,
+
+KC_EQL    , KC_6    , KC_7    , KC_8    , KC_9          , KC_0    , KC_ESCAPE      ,
+KC_PLUS   , _________________QWERTY_R1_________________  , LGUI(KC_SPACE) ,
+            _________________QWERTY_R2_________________  , MO(_NAVI) ,
+KC_MINS   , _________________QWERTY_R3_________________  , KC_QUOTE       ,
+KC_ESCAPE , KC_COLN , KC_PERC , XXXXXXX , LGUI(KC_L)    ,
+
+KC_LEFT,  KC_RGHT,
+KC_UP,
+KC_DOWN,  KC_TAB, KC_ENTER
+),
+
+  // layer 1
+[_SYMB] = LAYOUT_ergodox_wrapper(
+KC_ESCAPE , KC_F1         , KC_F2         , KC_F3       , KC_F4            , KC_F5    , KC_F6    ,
+XXXXXXX   , _________________SYMB_L1___________________ ,KC_ASTR  ,
+KC_TAB    ,  _________________SYMB_L2___________________,
+KC_LSHIFT ,  _________________SYMB_L3___________________, KC_SLASH ,
+KC_LCTL   , LSFT(KC_LGUI) , LSFT(KC_LALT) , KC_LALT     , WKSP_LEFT  ,
+
+                                              XXXXXXX,        XXXXXXX,
+                                                            XXXXXXX,
+                                    WKSP_RIGHT, KC_BSPACE,    KC_DEL,
+
+KC_F7     , KC_F8    , KC_F9   , KC_F10    , KC_F11    , KC_F12  , XXXXXXX  ,
+KC_PLUS   , _________________SYMB_R1___________________ , MO(_NAVI)  ,
+           _________________SYMB_R2___________________  , KC_DQUO ,
+KC_MINS  , _________________SYMB_R3___________________ , KC_QUOTE ,
+KC_ESCAPE , KC_COLN  , KC_PERC , XXXXXXX   , XXXXXXX   ,
+
+KC_LEFT,  KC_RGHT,
+KC_UP,
+KC_DOWN,  KC_TAB, KC_ENTER
+),
+
+  // layer 2
+[_NUMP] = LAYOUT_ergodox_wrapper(
+XXXXXXX ,  ___________________XXXXX___________________, XXXXXXX  ,
+XXXXXXX , _________________NUMP_L1___________________ , KC_ASTR  ,
+KC_TAB  , _________________NUMP_L2___________________ ,
+XXXXXXX , _________________NUMP_L3___________________ , KC_SLASH ,
+TO(0)   , XXXXXXX,   XXXXXXX,   XXXXXXX,   XXXXXXX,
+
+                                            XXXXXXX  ,  XXXXXXX  ,
+                                                        XXXXXXX  ,
+                                            KC_SPACE , KC_BSPACE , KC_DEL ,
+
+KC_EQL  , ___________________XXXXX___________________ , RESET   ,
+KC_PLUS , _________________NUMP_R1___________________ , XXXXXXX ,
+          _________________NUMP_R2___________________ , XXXXXXX                                     ,
+KC_MINS , _________________NUMP_R3___________________ , XXXXXXX ,
+                KC_0    , XXXXXXX , XXXXXXX , TO(3)   , XXXXXXX ,
+
+KC_LEFT,  KC_RGHT,
+KC_UP,
+KC_DOWN,  KC_LALT, KC_LSFT
+),
+
+  // layer 3
+[_OVERWATCH] = LAYOUT_ergodox_wrapper(
+KC_ESCAPE, KC_1    , KC_2 , KC_3 , KC_4 , KC_5 , TO(0) ,
+______________OVERWATCH_L1_________________ , XXXXXXX ,
+______________OVERWATCH_L2_________________ ,
+______________OVERWATCH_L3_________________ , XXXXXXX ,
+______________OVERWATCH_L4_________________ ,
+
+XXXXXXX  , XXXXXXX ,
+XXXXXXX  ,
+KC_SPACE , XXXXXXX , XXXXXXX ,
+
+
+_______, _______, _______, _______, _______, _______, _______,
+_______, _______, _______, _______, _______, _______, _______,
+         _______, _______, _______, _______, _______, _______,
+_______, _______, _______, _______, _______, _______, _______,
+_______, _______, _______, _______, _______,
+
+_______, _______,
+_______,
+_______, _______, _______
+
+),
+// layer 4
+[_NAVI] = LAYOUT_ergodox_wrapper(
+KC_ESCAPE, KC_1    , KC_2 , KC_3 , KC_4 , KC_5 , KC_6 ,
+XXXXXXX, _________________NAVI_L1___________________ , XXXXXXX ,
+XXXXXXX, _________________NAVI_L2___________________ ,
+XXXXXXX, _________________NAVI_L3___________________ , XXXXXXX ,
+XXXXXXX, XXXXXXX, XXXXXXX, XXXXXXX, WKSP_LEFT,
+
+XXXXXXX  , XXXXXXX ,
+XXXXXXX  ,
+WKSP_RIGHT , XXXXXXX , XXXXXXX ,
+
+
+_______, _______, _______, _______, _______, _______, _______,
+_______, _________________NAVI_R1___________________, _______,
+         _________________NAVI_R2___________________, _______,
+_______, _________________NAVI_R3___________________, _______,
+MODSFT, _______, _______, _______, _______,
+
+_______, _______,
+_______,
+_______, _______, KC_LGUI
+
+),
+};
+
+
+// called by QMK during key processing before the actual key event is handled. Useful for macros.
+bool process_record_user(uint16_t keycode, keyrecord_t *record) {
+  uint8_t layer = biton32(layer_state);
+  switch (keycode) {
+    case TAP_TOG_LAYER:
+      process_tap_tog(_SYMB,record);
+      return false;
+      break;
+
+    case WKSP_LEFT:
+      // Only if TAP_TOG_LAYER is being held right now do we want to do actions.
+      if (record->event.pressed && (!tap_tog_layer_toggled_on || layer == _NAVI)) {
+        tap_code16(LGUI(LSFT(KC_Z)));
+        tap_tog_layer_other_key_pressed = true; // Add flag so layer resets
+      }
+      break;
+    case WKSP_RIGHT:
+      // Only if TAP_TOG_LAYER is being held right now do we want to do actions.
+      if (record->event.pressed && (!tap_tog_layer_toggled_on || layer == _NAVI)) {
+        tap_code16(LGUI(LSFT(KC_X)));
+        tap_tog_layer_other_key_pressed = true; // Add flag so layer resets
+      }
+      break;
+    default:
+      tap_tog_count = 0; // reset counter.
+      tap_tog_layer_other_key_pressed = true; // always set this to true, TAP_TOG_LAYER handlers will handle interpreting this
+      break;
+  }
+  return true;
+}
+
+// Runs constantly in the background, in a loop every 100ms or so.
+// Best used for LED status output triggered when user isn't actively typing.
+void matrix_scan_user(void) {
+  uint8_t layer = biton32(layer_state);
+  if (layer == 0) {
+    // Set up LED indicators for stuck modifier keys.
+    // https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/report.h#L118
+    switch (keyboard_report->mods) {
+      case MOD_BIT(KC_LSFT): // LSHIFT
+        ergodox_right_led_1_set (LED_BRIGHTNESS_LO);
+        ergodox_right_led_1_on ();
+        ergodox_right_led_2_set (LED_BRIGHTNESS_LO);
+        ergodox_right_led_2_on ();
+        ergodox_right_led_3_set (LED_BRIGHTNESS_HI);
+        ergodox_right_led_3_off ();
+        break;
+
+      case MOD_BIT(KC_LGUI): // LGUI
+        ergodox_right_led_1_set (LED_BRIGHTNESS_HI);
+        ergodox_right_led_1_off ();
+        ergodox_right_led_2_set (LED_BRIGHTNESS_LO);
+        ergodox_right_led_2_on ();
+        ergodox_right_led_3_set (LED_BRIGHTNESS_LO);
+        ergodox_right_led_3_on ();
+        break;
+
+      case MOD_BIT(KC_LSFT) ^ MOD_BIT(KC_LGUI):
+        ergodox_right_led_1_set (70);
+        ergodox_right_led_1_on ();
+        ergodox_right_led_2_set (70);
+        ergodox_right_led_2_on ();
+        ergodox_right_led_3_set (70);
+        ergodox_right_led_3_on ();
+        break;
+
+      default: // reset leds
+        ergodox_right_led_1_set (LED_BRIGHTNESS_HI);
+        ergodox_right_led_1_off ();
+        ergodox_right_led_2_set (LED_BRIGHTNESS_HI);
+        ergodox_right_led_2_off ();
+        ergodox_right_led_3_set (LED_BRIGHTNESS_HI);
+        ergodox_right_led_3_off ();
+    }
+  }
+}
+
+// only runs when when the layer is changed, good for updating LED's and clearing sticky state
+uint32_t layer_state_set_user(uint32_t state) {
+  uint8_t layer = biton32(state);
+
+  ergodox_board_led_off();
+  ergodox_right_led_1_off();
+  ergodox_right_led_2_off();
+  ergodox_right_led_3_off();
+
+  combo_enable(); // by default, enable combos.
+  switch (layer) {
+    case 0:
+      break;
+    case 1:
+      clear_mods();
+      ergodox_right_led_1_on();
+      break;
+    case 2:
+      clear_mods();
+      ergodox_right_led_2_on();
+      break;
+    case _OVERWATCH:
+      clear_mods();
+      combo_disable(); // We don't want combos in overwatch
+      ergodox_right_led_3_on();
+      break;
+    case 4:
+      ergodox_right_led_1_on();
+      ergodox_right_led_2_on();
+      break;
+    case 5:
+      ergodox_right_led_1_on();
+      ergodox_right_led_3_on();
+      break;
+    case 6:
+      ergodox_right_led_2_on();
+      ergodox_right_led_3_on();
+      break;
+    case 7:
+      ergodox_right_led_1_on();
+      ergodox_right_led_2_on();
+      ergodox_right_led_3_on();
+      break;
+    default:
+      break;
+  }
+  return state;
+};
diff --git a/layouts/community/ergodox/issmirnov/push.sh b/layouts/community/ergodox/issmirnov/push.sh
new file mode 100755
index 000000000..1a6c7c447
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/push.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+make ergodox_ez:issmirnov:teensy
diff --git a/layouts/community/ergodox/issmirnov/template.txt b/layouts/community/ergodox/issmirnov/template.txt
new file mode 100644
index 000000000..35c7920a1
--- /dev/null
+++ b/layouts/community/ergodox/issmirnov/template.txt
@@ -0,0 +1,17 @@
+,--------------------------------------------.      ,--------------------------------------------.
+|    0   |  1  |  2  |  3  |  4  |  5  |  6  |      | 38  | 39  | 40  | 41  | 42  | 43  | 44     |
+|--------+-----+-----+-----+-----+-----+-----|      |-----+-----+-----+-----+-----+-----+--------|
+|    7   |  8  |  9  | 10  | 11  | 12  | 13  |      | 45  | 46  | 47  | 48  | 49  | 50  | 51     |
+|--------+-----+-----+-----+-----+-----|     |      |     |-----+-----+-----+-----+-----+--------|
+|   14   | 15  | 16  | 17  | 18  | 19  |-----|      |-----| 52  | 53  | 54  | 55  | 56  | 57     |
+|--------+-----+-----+-----+-----+-----| 26  |      | 58  |-----+-----+-----+-----+-----+--------|
+|   20   | 21  | 22  | 23  | 24  | 25  |     |      |     | 59  | 60  | 61  | 62  | 63  | 64     |
+`--------+-----+-----+-----+-----+-----------'      `-----------+-----+-----+-----+-----+--------'
+   | 27  | 28  | 29  | 30  | 31  |                              | 65  | 66  | 67  | 68  | 69  |
+   `-----------------------------' ,-----------.  ,-----------. `-----------------------------'
+                                   | 32  | 33  |  | 70  | 71  |
+                             ,-----|-----|-----|  |-----+-----+-----.
+                             |     |     | 34  |  | 72  |     |     |
+                             | 35  | 36  |-----|  |-----| 74  | 75  |
+                             |     |     | 37  |  | 73  |     |     |
+                             `-----------------'  `-----------------'
diff --git a/users/issmirnov/config.h b/users/issmirnov/config.h
new file mode 100644
index 000000000..664ebfe8a
--- /dev/null
+++ b/users/issmirnov/config.h
@@ -0,0 +1,45 @@
+#pragma once
+
+// Allows sending more than one key per scan. Useful for chords.
+#define QMK_KEYS_PER_SCAN 4
+
+// how long before a tap becomes a hold
+#undef TAPPING_TERM
+#define TAPPING_TERM 100
+
+// makes tap and hold keys work better for fast typers who don't want
+// tapping term set above 500
+#define PERMISSIVE_HOLD
+
+// tap anyway, even after TAPPING_TERM, if there was no other key
+// interruption between press and release
+#define RETRO_TAPPING
+
+// how many taps before triggering the toggle
+#undef ONESHOT_TAP_TOGGLE
+#define ONESHOT_TAP_TOGGLE 2
+
+// how long before oneshot modifier key times out (currently only shift)
+#undef ONESHOT_TIMEOUT
+#define ONESHOT_TIMEOUT 2000
+
+// Enable combos for vim
+#define COMBO_COUNT 5 // Specify the number of combos used. BE SURE TO INCREMENT AS NEEDED
+#define COMBO_TERM 50 // window in milliseconds to trigger combo
+
+// Allow more than 4 keys to be sent to the system. Useful for gaming.
+// #define FORCE_NKRO
+
+// Save 200 bytes on unused keycodes
+#undef LOCKING_SUPPORT_ENABLE
+#undef LOCKING_RESYNC_ENABLE
+
+// Enable HID_listen commands.
+#define NO_DEBUG
+#undef NO_PRINT
+#define USER_PRINT
+
+// Note: Defining the following does not have any impact on space:
+// - NO_ACTION_MACRO
+// - NO_ACTION_FUNCTION
+// - DISABLE_LEADER
diff --git a/users/issmirnov/issmirnov.c b/users/issmirnov/issmirnov.c
new file mode 100644
index 000000000..665afbcfd
--- /dev/null
+++ b/users/issmirnov/issmirnov.c
@@ -0,0 +1,43 @@
+#include "issmirnov.h"
+
+enum combo_events {
+  JK_ESC,
+  DF_CLN,
+  SD_SLASH,
+  XC_COPY,
+  XV_PASTE
+};
+
+
+const uint16_t PROGMEM jk_combo[] = {KC_J, KC_K, COMBO_END};
+const uint16_t PROGMEM df_combo[] = {KC_D, KC_F, COMBO_END};
+const uint16_t PROGMEM sd_combo[] = {KC_S, KC_D, COMBO_END};
+const uint16_t PROGMEM copy_combo[] = {KC_X, KC_C, COMBO_END};
+const uint16_t PROGMEM paste_combo[] = {KC_X, KC_V, COMBO_END};
+
+
+// BE SURE TO UPDATE THE CONFIG.H "COMBO_COUNT" value when you add elements here!
+combo_t key_combos[COMBO_COUNT] = {
+  COMBO(jk_combo, KC_ESC),
+  COMBO(df_combo, KC_COLON),
+  COMBO(sd_combo, KC_SLASH),
+  [XC_COPY] = COMBO_ACTION(copy_combo),
+  [XV_PASTE] = COMBO_ACTION(paste_combo),
+};
+
+
+void process_combo_event(uint8_t combo_index, bool pressed) {
+  switch(combo_index) {
+    case XC_COPY:
+      if (pressed) {
+        tap_code16(LCTL(KC_C));
+      }
+      break;
+
+    case XV_PASTE:
+      if (pressed) {
+        tap_code16(LCTL(KC_V));
+      }
+      break;
+  }
+}
diff --git a/users/issmirnov/issmirnov.h b/users/issmirnov/issmirnov.h
new file mode 100644
index 000000000..eef80dfc4
--- /dev/null
+++ b/users/issmirnov/issmirnov.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include QMK_KEYBOARD_H
+
+#include "rows.h"
+
+// Each layer gets a name for readability, which is then used in the keymap matrix below.
+// The underscores don't mean anything - you can have a layer called STUFF or any other name.
+// Layer names don't all need to be of the same length, obviously, and you can also skip them
+// entirely and just use numbers
+enum {
+  _QWERTY = 0,
+  _SYMB,
+  _NUMP,
+  _OVERWATCH,
+  _NAVI
+};
+
+enum custom_keycodes {
+  PLACEHOLDER = SAFE_RANGE,
+  TAP_TOG_LAYER,
+  CLEAR_EEPROM,
+  WKSP_LEFT, // Smart key that only activates when we are momentarily in a layer
+  WKSP_RIGHT, // Smart key that only activates when we are momentarily in a layer
+};
+
+
+#define LOWER MO(_SYMB)
+#define RAISE MO(_NUMP)
+
+#define CTL_SPC MT(MOD_LCTL, KC_SPC)
+#define OSMSFT OSM(MOD_LSFT)
+#define LOCK LGUI(KC_L)
+#define MODSFT LSFT(KC_LGUI)
+#define APPS LGUI(KC_SPC)
diff --git a/users/issmirnov/rows.h b/users/issmirnov/rows.h
new file mode 100644
index 000000000..d35af2175
--- /dev/null
+++ b/users/issmirnov/rows.h
@@ -0,0 +1,55 @@
+#pragma once
+
+#include QMK_KEYBOARD_H
+
+// This wrapper is required in order to expand the row macro inside the keymap configs.
+#define LAYOUT_ergodox_wrapper(...)          LAYOUT_ergodox(__VA_ARGS__)
+#define LAYOUT_ortho_4x12_wrapper(...)          LAYOUT_ortho_4x12(__VA_ARGS__)
+
+// Share common config. We'll skip the mod rows and func rows.
+// Note, it's also really neat the way the scoping works. Since we perform the expansion in the keymap.c file
+// so we can use our enums for custom keycodes
+#define _________________QWERTY_L1_________________        KC_Q , KC_W , KC_E   , KC_R     , KC_T
+#define _________________QWERTY_L2_________________        KC_A , KC_S , KC_D   , KC_F     , KC_G
+#define _________________QWERTY_L3_________________        KC_Z , KC_X , KC_C   , KC_V     , KC_B
+
+#define _________________QWERTY_R1_________________        KC_Y , KC_U , KC_I   , KC_O     , KC_P
+#define _________________QWERTY_R2_________________        KC_H , KC_J , KC_K   , KC_L     , TAP_TOG_LAYER
+#define _________________QWERTY_R3_________________        KC_N , KC_M , KC_DOT , KC_COMMA , TG(_NUMP)
+
+#define ___________________BLANK___________________        _______ , _______ , _______ , _______ , _______
+#define ___________________XXXXX___________________        XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
+
+#define _________________SYMB_L1___________________        KC_MINS , KC_AT   , KC_LCBR     , KC_RCBR     , KC_GRV
+#define _________________SYMB_L2___________________        KC_CIRC , KC_UNDS , KC_LPRN     , KC_RPRN     , KC_DLR
+#define _________________SYMB_L3___________________        KC_LABK , KC_RABK , KC_LBRACKET , KC_RBRACKET , KC_TILD
+
+#define _________________SYMB_R1___________________        KC_ASTR , KC_EXLM , KC_PIPE     , KC_PERC     , KC_PLUS
+#define _________________SYMB_R2___________________        KC_HASH , KC_EQL  , KC_COLN     , KC_SCLN     , TAP_TOG_LAYER
+#define _________________SYMB_R3___________________        KC_AMPR , KC_QUES , KC_SLASH    , KC_BSLASH   , TG(_NUMP)
+
+
+#define _________________NUMP_L1___________________        KC_NO   , KC_NO         , LGUI(KC_UP)   , XXXXXXX             , XXXXXXX
+#define _________________NUMP_L2___________________        XXXXXXX , LGUI(KC_LEFT) , LGUI(KC_DOWN) , LGUI(KC_RIGHT)      , XXXXXXX
+#define _________________NUMP_L3___________________        XXXXXXX , XXXXXXX       , XXXXXXX       , KC_AUDIO_VOL_DOWN   , KC_AUDIO_VOL_UP
+
+#define _________________NUMP_R1___________________        KC_COMM , KC_7          , KC_8          , KC_9                , XXXXXXX
+#define _________________NUMP_R2___________________        KC_0    , KC_4          , KC_5          , KC_6                , TO(_SYMB)
+#define _________________NUMP_R3___________________        KC_DOT  , KC_1          , KC_2          , KC_3                , TO(_QWERTY)
+
+// Note: These are 6x1 blocks, since modifiers are also adjusted.
+#define ______________OVERWATCH_L1_________________       KC_TAB    , KC_Q  , KC_W       , KC_E , KC_R , KC_T
+#define ______________OVERWATCH_L2_________________       KC_LCTL   , KC_A  , KC_S       , KC_D , KC_F , KC_P
+#define ______________OVERWATCH_L3_________________       KC_LSHIFT , KC_Z  , KC_X       , KC_C , KC_V , KC_GRAVE
+// Ergodox only has 5 keys on bottom row:
+#define ______________OVERWATCH_L4_________________       KC_LCTL   , KC_F9 , KC_PSCREEN , KC_H , KC_R
+
+
+
+#define _________________NAVI_L1___________________        XXXXXXX , XXXXXXX , KC_UP   , XXXXXXX , XXXXXXX
+#define _________________NAVI_L2___________________        XXXXXXX , KC_LEFT , KC_DOWN , KC_RGHT , XXXXXXX
+#define _________________NAVI_L3___________________        XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
+
+#define _________________NAVI_R1___________________        XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
+#define _________________NAVI_R2___________________        XXXXXXX , KC_LCTL , XXXXXXX , XXXXXXX , XXXXXXX
+#define _________________NAVI_R3___________________        XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX , XXXXXXX
diff --git a/users/issmirnov/rules.mk b/users/issmirnov/rules.mk
new file mode 100644
index 000000000..096d7b4c0
--- /dev/null
+++ b/users/issmirnov/rules.mk
@@ -0,0 +1,25 @@
+
+SRC += tap_tog.c
+SRC += issmirnov.c
+
+# https://www.reddit.com/r/olkb/comments/bmpgjm/programming_help/
+# Should shave 2000 bytes
+LINK_TIME_OPTIMIZATION_ENABLE = yes
+
+# Enable debugging only when needed.
+CONSOLE_ENABLE = yes # +400 bytes (hid_listen support)
+
+# Enable combo keys for vim usage.
+# https://github.com/qmk/qmk_firmware/blob/master/docs/feature_combo.md
+COMBO_ENABLE = yes
+
+# This allows the keyboard to tell the host OS that up to 248 keys are held down at once
+NKRO_ENABLE = no # note: also needs FORCE_NKRO in config.h
+
+# Disable unused features to save on space
+# https://thomasbaart.nl/2018/12/01/reducing-firmware-size-in-qmk/
+MOUSEKEY_ENABLE   = no # 2000 bytes
+BOOTMAGIC_ENABLE  = no
+COMMAND_ENABLE    = no # https://beta.docs.qmk.fm/features/feature_command
+UNICODE_ENABLE    = no  # Unicode
+SWAP_HANDS_ENABLE = no  # Allow swapping hands of keyboard
diff --git a/users/issmirnov/tap_tog.c b/users/issmirnov/tap_tog.c
new file mode 100644
index 000000000..02cea08b1
--- /dev/null
+++ b/users/issmirnov/tap_tog.c
@@ -0,0 +1,52 @@
+#include QMK_KEYBOARD_H
+
+#include "tap_tog.h"
+
+bool tap_tog_layer_other_key_pressed = false;
+bool tap_tog_layer_toggled_on = false;
+uint8_t tap_tog_count = 0;
+
+void process_tap_tog(uint8_t layer, keyrecord_t *record) {
+  tap_tog_count++;
+  // press
+  if (record->event.pressed) {
+
+    // TTL has already been pressed and we are toggled into that layer
+    // so now we need to leave
+    if(tap_tog_layer_toggled_on) {
+      layer_clear();
+      tap_tog_layer_toggled_on = false;
+    }
+
+    // this means we're in our default layer
+    // so switch the layer immediately
+    // whether we'll switch back when it's released depends on if a button gets pressed while this is held down
+    else {
+      // switch layer
+      layer_on(layer);
+      tap_tog_layer_other_key_pressed = false; // if this becomes true before it gets released, it will act as a held modifier
+    }
+  }
+
+  // release
+  else {
+    // if it was used as a held modifier (like traditional shift)
+    if(tap_tog_layer_other_key_pressed) {
+      // switch layer back
+      layer_clear();
+    }
+    // if it was used as a toggle button
+    else {
+      // next time, it will turn layer off
+      tap_tog_layer_toggled_on = true;
+
+      // If it's been tapped twice, reset the toggle flag.
+      // Otherwise, we get stuck oscillating between this code block and the
+      // pressed && TTL_toggled_on block.
+      if (tap_tog_count >= 4 ) {
+        tap_tog_count = 0;
+        tap_tog_layer_toggled_on = false;
+      }
+    }
+  }
+}
diff --git a/users/issmirnov/tap_tog.h b/users/issmirnov/tap_tog.h
new file mode 100644
index 000000000..f59711f04
--- /dev/null
+++ b/users/issmirnov/tap_tog.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "issmirnov.h"
+
+extern bool tap_tog_layer_other_key_pressed; // set to true if any key pressed while TAP_TOG_LAYER held down
+extern bool tap_tog_layer_toggled_on; // will become true if no keys are pressed while TTL held down
+extern uint8_t tap_tog_count; // number of presses on TAP_TOG_LAYER button.
+
+// Tap dance analog with momentary toggle when held, switch when tapped
+void process_tap_tog(uint8_t layer, keyrecord_t *record);