I think I'm actually done now

keyboards/keebio/iris_lm/keymaps/drew/combos/combos.c

@@ -2,34 +2,6 @@
 #include "../alias.h"
 #include "../layers/layers.h"
 
-// uint16_t get_combo_term(uint16_t combo_index, combo_t *combo) {
-//     switch (combo_index) {
-//         case NumCombo:
-//             return 75;
-//             break;
-//     }
-//     return COMBO_TERM;
-// }
-
-// bool process_combo_key_release(
-//     uint16_t combo_index, combo_t* combo, uint8_t key_index, uint16_t keycode
-// ) {
-//     switch (combo_index) {
-//         case NumCombo: // release the combo on any releases
-//             switch (keycode) {
-//                 case SYM_ENT:
-//                     layer_off(_SYM);
-//                     break;
-//                 case NAV_CANCEL:
-//                     layer_off(_NAV);
-//                     break;
-//             }
-//             layer_off(_NUM);
-//             break;
-//     }
-//     return false;
-// }
-
 bool process_combo_key_repress(
     uint16_t combo_index, combo_t* combo, uint8_t key_index, uint16_t keycode
 ) {

keyboards/keebio/iris_lm/keymaps/drew/combos/combos.h

@@ -3,6 +3,5 @@
 #include QMK_KEYBOARD_H
 
 enum Combos {
-    // NumCombo,
     WinSwapCombo,
 };

keyboards/keebio/iris_lm/keymaps/drew/keymap.c

@@ -4,6 +4,7 @@
 #include "./layers/layers.h"
 #include "./tap_dance/tap_dance.h"
 #include "./utils/utils.h"
+#include <stdbool.h>
 #include <stdint.h>
 
 // clang-format off
@@ -70,9 +71,9 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 //├───────────┼───────────┼───────────┼───────────┼───────────┼───────────┤                           ├───────────┼───────────┼───────────┼───────────┼───────────┼───────────┤
    KC_TRNS,    KC_ESC,     KC_NO,      TAB_LEFT,   TAB_RIGHT,  KC_NO,                                  KC_NO,      KC_HOME,    KC_UP,      KC_END,     KC_DEL,     KC_TRNS,
 //├───────────┼───────────┼───────────┼───────────┼───────────┼───────────┤                           ├───────────┼───────────┼───────────┼───────────┼───────────┼───────────┤
-   KC_TRNS,    OS_LGUI,    OS_LALT,    OS_LCTL,    OS_LSFT,    CW_TOGG,                                KC_CAPS,    KC_LEFT,    KC_DOWN,    KC_RGHT,    KC_SLSH,    KC_TRNS,
+   KC_TRNS,    OS_LGUI,    OS_LALT,    OS_LCTL,    OS_LSFT,    CW_TOGG,                                COMPOSE,    KC_LEFT,    KC_DOWN,    KC_RGHT,    KC_SLSH,    KC_TRNS,
 //├───────────┼───────────┼───────────┼───────────┼───────────┼───────────┼───────────┐   ┌───────────┼───────────┼───────────┼───────────┼───────────┼───────────┼───────────┤
-   KC_TRNS,    C(KC_Z),    C(KC_X),    C(KC_C),    C(KC_V),    C(KC_Y),    TD_CLS,         QK_BOOT,    COMPOSE,    KC_F2,      KC_COMM,    KC_DOT,     KC_SCLN,    KC_TRNS,
+   KC_TRNS,    C(KC_Z),    C(KC_X),    C(KC_C),    C(KC_V),    C(KC_Y),    TD_CLS,         QK_BOOT,    KC_F2,      KC_CAPS,      KC_COMM,    KC_DOT,     KC_SCLN,    KC_TRNS,
 //└───────────┴───────────┴───────────┴─────┬─────┴─────┬─────┴─────┬─────┴────┬──────┘   └─────┬─────┴─────┬─────┴─────┬─────┴─────┬─────┴───────────┴───────────┴───────────┘
                                              FN_LAUNCH,  NAV_TAB,    NUM_SPC,                    KC_TRNS,    KC_TRNS,    KC_TRNS
 //                                          └───────────┴───────────┴──────────┘                └───────────┴───────────┴───────────┘
@@ -122,7 +123,24 @@ combo_t key_combos[] = {
 };
 
 bool process_record_user(uint16_t keycode, keyrecord_t* record) {
+    static bool NAV_is_on = false;
+
     switch (keycode) {
+        // allow NAV and SYM to override each other
+        case SYM_ENT:
+            if (!record->tap.count) {
+                if (NAV_is_on) {
+                    record->event.pressed ? layer_off(_NAV) : layer_on(_NAV);
+                }
+            }
+            break;
+
+        case NAV_TAB:
+            if (!record->tap.count) {
+                NAV_is_on = record->event.pressed;
+            }
+            break;
+
         case WIN_SWAP: // easy Alt-Tab
             if (record->event.pressed) {
                 register_mods(MOD_LALT);

keyboards/keebio/iris_lm/keymaps/drew/layers/layers.c

@@ -1,11 +0,0 @@
-#include "./layers.h"
-
-bool NUM_latched = false;
-bool NAV_pressed_first = false;
-
-layer_state_t layer_state_set_user(layer_state_t state) {
-    // allow the SYM and NUM layers to override each other
-    
-
-    return state;
-}

keyboards/keebio/iris_lm/keymaps/drew/layers/layers.h

@@ -10,8 +10,6 @@ enum {
     _SYM,
     _NAV,
     _FUNC,
-    // _SH_NUM,
     _SH_ARROW,
 };
 
-// extern bool NUM_latched;

keyboards/keebio/iris_lm/keymaps/drew/rules.mk

@@ -3,9 +3,8 @@ BOOTLOADER = stm32-dfu
 SRC += caps_word/caps_word.c
 SRC += tap_dance/tap_dance.c
 SRC += combos/combos.c
-SRC += layers/layers.c
 SRC += taphold/taphold_options.c
-SRC += utils/utils.c
+# SRC += utils/utils.c
 
 # VIA_ENABLE = yes
 LTO_ENABLE = yes