diff --git a/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.c b/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.c
new file mode 100644
index 00000000..b2307206
--- /dev/null
+++ b/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.c
@@ -0,0 +1,64 @@
+#include "./combos.h"
+#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 150; // make a larger window for triggering the combo
+            break;
+    }
+    return COMBO_TERM;
+}
+
+// necessary to make sure the layers are turned off for the NUM layer combo, since the original
+// layer keys are consumed by the combo activation
+bool process_combo_key_release(
+    uint16_t combo_index, combo_t* combo, uint8_t key_index, uint16_t keycode
+) {
+    switch (combo_index) {
+        case NumCombo:
+            // whenever one of the layer keys is released, turn off that layer (this will
+            // automatically turn off the NUM layer because of the layer_state_set_user() callback)
+            switch (keycode) {
+                case SYM_BSPC:
+                    layer_off(_SYM);
+                    break;
+                case NAV_TAB:
+                    layer_off(_NAV);
+                    break;
+            }
+            break;
+    }
+    return false;
+}
+
+// necessary for the NUM layer combo, since it shouldn't trigger on a tap
+bool get_combo_must_hold(uint16_t combo_index, combo_t* combo) {
+    switch (combo_index) {
+        case NumCombo: // make the NUM layer combo hold-only
+            return true;
+            break;
+    }
+    return false;
+}
+
+bool process_combo_key_repress(
+    uint16_t combo_index, combo_t* combo, uint8_t key_index, uint16_t keycode
+) {
+    switch (combo_index) {
+        case WinSwapCombo:
+            // implement the tab left and tab right part of alt-tab
+            switch (keycode) {
+                case TAB_LEFT:
+                    tap_code16(S(KC_TAB));
+                    break;
+                case TAB_RIGHT:
+                    tap_code(KC_TAB);
+                    break;
+            }
+            return true;
+            break;
+    }
+    return false;
+}
\ No newline at end of file
diff --git a/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.h b/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.h
new file mode 100644
index 00000000..5bab6667
--- /dev/null
+++ b/keyboards/keebio/nyquist/rev4/keymaps/drew/combos/combos.h
@@ -0,0 +1,8 @@
+#pragma once
+
+#include QMK_KEYBOARD_H
+
+enum Combos {
+    NumCombo,
+    WinSwapCombo,
+};
\ No newline at end of file
diff --git a/keyboards/keebio/nyquist/rev4/keymaps/drew/keyboard.json b/keyboards/keebio/nyquist/rev4/keymaps/drew/keyboard.json
new file mode 100644
index 00000000..cb5c3a39
--- /dev/null
+++ b/keyboards/keebio/nyquist/rev4/keymaps/drew/keyboard.json
@@ -0,0 +1,324 @@
+{
+    "keyboard_name": "Nyquist Rev. 4",
+    "usb": {
+        "pid": "0x4156",
+        "device_version": "4.0.0"
+    },
+    "processor": "RP2040",
+    "bootloader": "rp2040",
+    "diode_direction": "COL2ROW",
+    "features": {
+        "mousekey": true,
+        "extrakey": true,
+        "rgb_matrix": true
+    },
+    "split": {
+        "enabled": true,
+        "encoder": {
+            "right": {
+                "rotary": [
+                    {"pin_a": "GP1", "pin_b": "GP0" }
+                ]
+            }
+        },
+        "handedness": {
+            "pin": "GP23"
+        },
+        "matrix_pins": {
+            "right":{
+                "cols": ["GP25", "GP29", "GP20", "GP11", "GP3", "GP2"],
+                "rows": ["GP24", "GP17", "GP15", "GP14", "GP12"]
+            }
+        },
+        "serial": {
+            "driver": "vendor"
+        },
+        "transport": {
+            "sync" :{
+                "matrix_state": true
+            }
+        }
+    },
+    "matrix_pins": {
+        "cols": ["GP29", "GP22", "GP0", "GP3", "GP11", "GP6"],
+        "rows": ["GP2", "GP1", "GP17", "GP25", "GP24"]
+    },
+    "encoder": {
+        "enabled": true,
+        "rotary": [
+            {"pin_a": "GP26", "pin_b": "GP27" }
+        ]
+    },
+    "ws2812": {
+        "driver": "vendor",
+        "pin": "GP28"
+    },
+    "layouts": {
+        "LAYOUT_ortho_5x12": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+                {"matrix": [0, 4], "x": 4, "y": 0},
+                {"matrix": [0, 5], "x": 5, "y": 0},
+
+                {"matrix": [5, 0], "x": 7, "y": 0},
+                {"matrix": [5, 1], "x": 8, "y": 0},
+                {"matrix": [5, 2], "x": 9, "y": 0},
+                {"matrix": [5, 3], "x": 10, "y": 0},
+                {"matrix": [5, 4], "x": 11, "y": 0},
+                {"matrix": [5, 5], "x": 12, "y": 0},
+
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1},
+                {"matrix": [1, 4], "x": 4, "y": 1},
+                {"matrix": [1, 5], "x": 5, "y": 1},
+
+                {"matrix": [6, 0], "x": 7, "y": 1},
+                {"matrix": [6, 1], "x": 8, "y": 1},
+                {"matrix": [6, 2], "x": 9, "y": 1},
+                {"matrix": [6, 3], "x": 10, "y": 1},
+                {"matrix": [6, 4], "x": 11, "y": 1},
+                {"matrix": [6, 5], "x": 12, "y": 1},
+
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2},
+                {"matrix": [2, 4], "x": 4, "y": 2},
+                {"matrix": [2, 5], "x": 5, "y": 2},
+
+                {"matrix": [7, 0], "x": 7, "y": 2},
+                {"matrix": [7, 1], "x": 8, "y": 2},
+                {"matrix": [7, 2], "x": 9, "y": 2},
+                {"matrix": [7, 3], "x": 10, "y": 2},
+                {"matrix": [7, 4], "x": 11, "y": 2},
+                {"matrix": [7, 5], "x": 12, "y": 2},
+
+                {"matrix": [3, 0], "x": 0, "y": 3},
+                {"matrix": [3, 1], "x": 1, "y": 3},
+                {"matrix": [3, 2], "x": 2, "y": 3},
+                {"matrix": [3, 3], "x": 3, "y": 3},
+                {"matrix": [3, 4], "x": 4, "y": 3},
+                {"matrix": [3, 5], "x": 5, "y": 3},
+
+                {"matrix": [8, 0], "x": 7, "y": 3},
+                {"matrix": [8, 1], "x": 8, "y": 3},
+                {"matrix": [8, 2], "x": 9, "y": 3},
+                {"matrix": [8, 3], "x": 10, "y": 3},
+                {"matrix": [8, 4], "x": 11, "y": 3},
+                {"matrix": [8, 5], "x": 12, "y": 3},
+
+                {"matrix": [4, 0], "x": 0, "y": 4},
+                {"matrix": [4, 1], "x": 1, "y": 4},
+                {"matrix": [4, 2], "x": 2, "y": 4},
+                {"matrix": [4, 3], "x": 3, "y": 4},
+                {"matrix": [4, 4], "x": 4, "y": 4},
+                {"matrix": [4, 5], "x": 5, "y": 4},
+
+                {"matrix": [9, 0], "x": 7, "y": 4},
+                {"matrix": [9, 1], "x": 8, "y": 4},
+                {"matrix": [9, 2], "x": 9, "y": 4},
+                {"matrix": [9, 3], "x": 10, "y": 4},
+                {"matrix": [9, 4], "x": 11, "y": 4},
+                {"matrix": [9, 5], "x": 12, "y": 4}
+            ]
+        },
+        "LAYOUT_ortho_4x12": {
+            "layout": [
+                {"matrix": [0, 0], "x": 0, "y": 0},
+                {"matrix": [0, 1], "x": 1, "y": 0},
+                {"matrix": [0, 2], "x": 2, "y": 0},
+                {"matrix": [0, 3], "x": 3, "y": 0},
+                {"matrix": [0, 4], "x": 4, "y": 0},
+                {"matrix": [0, 5], "x": 5, "y": 0},
+
+                {"matrix": [5, 0], "x": 7, "y": 0},
+                {"matrix": [5, 1], "x": 8, "y": 0},
+                {"matrix": [5, 2], "x": 9, "y": 0},
+                {"matrix": [5, 3], "x": 10, "y": 0},
+                {"matrix": [5, 4], "x": 11, "y": 0},
+                {"matrix": [5, 5], "x": 12, "y": 0},
+
+                {"matrix": [1, 0], "x": 0, "y": 1},
+                {"matrix": [1, 1], "x": 1, "y": 1},
+                {"matrix": [1, 2], "x": 2, "y": 1},
+                {"matrix": [1, 3], "x": 3, "y": 1},
+                {"matrix": [1, 4], "x": 4, "y": 1},
+                {"matrix": [1, 5], "x": 5, "y": 1},
+
+                {"matrix": [6, 0], "x": 7, "y": 1},
+                {"matrix": [6, 1], "x": 8, "y": 1},
+                {"matrix": [6, 2], "x": 9, "y": 1},
+                {"matrix": [6, 3], "x": 10, "y": 1},
+                {"matrix": [6, 4], "x": 11, "y": 1},
+                {"matrix": [6, 5], "x": 12, "y": 1},
+
+                {"matrix": [2, 0], "x": 0, "y": 2},
+                {"matrix": [2, 1], "x": 1, "y": 2},
+                {"matrix": [2, 2], "x": 2, "y": 2},
+                {"matrix": [2, 3], "x": 3, "y": 2},
+                {"matrix": [2, 4], "x": 4, "y": 2},
+                {"matrix": [2, 5], "x": 5, "y": 2},
+
+                {"matrix": [7, 0], "x": 7, "y": 2},
+                {"matrix": [7, 1], "x": 8, "y": 2},
+                {"matrix": [7, 2], "x": 9, "y": 2},
+                {"matrix": [7, 3], "x": 10, "y": 2},
+                {"matrix": [7, 4], "x": 11, "y": 2},
+                {"matrix": [7, 5], "x": 12, "y": 2},
+
+                {"matrix": [3, 0], "x": 0, "y": 3},
+                {"matrix": [3, 1], "x": 1, "y": 3},
+                {"matrix": [3, 2], "x": 2, "y": 3},
+                {"matrix": [3, 3], "x": 3, "y": 3},
+                {"matrix": [3, 4], "x": 4, "y": 3},
+                {"matrix": [3, 5], "x": 5, "y": 3},
+
+                {"matrix": [8, 0], "x": 7, "y": 3},
+                {"matrix": [8, 1], "x": 8, "y": 3},
+                {"matrix": [8, 2], "x": 9, "y": 3},
+                {"matrix": [8, 3], "x": 10, "y": 3},
+                {"matrix": [8, 4], "x": 11, "y": 3},
+                {"matrix": [8, 5], "x": 12, "y": 3}
+            ]
+        }
+    },
+    "rgb_matrix": {
+        "driver": "ws2812",
+        "split_count": [36, 36],
+        "max_brightness": 120,
+        "animations": {
+            "alphas_mods": true,
+            "gradient_up_down": true,
+            "gradient_left_right": true,
+            "breathing": true,
+            "band_sat": true,
+            "band_val": true,
+            "band_pinwheel_sat": true,
+            "band_pinwheel_val": true,
+            "band_spiral_sat": true,
+            "band_spiral_val": true,
+            "cycle_all": true,
+            "cycle_left_right": true,
+            "cycle_up_down": true,
+            "cycle_out_in": true,
+            "cycle_out_in_dual": true,
+            "rainbow_moving_chevron": true,
+            "cycle_pinwheel": true,
+            "cycle_spiral": true,
+            "dual_beacon": true,
+            "rainbow_beacon": true,
+            "rainbow_pinwheels": true,
+            "raindrops": true,
+            "jellybean_raindrops": true,
+            "hue_breathing": true,
+            "hue_pendulum": true,
+            "hue_wave": true,
+            "pixel_fractal": true,
+            "pixel_flow": true,
+            "pixel_rain": true,
+            "typing_heatmap": true,
+            "digital_rain": true,
+            "solid_reactive_simple": true,
+            "solid_reactive": true,
+            "solid_reactive_wide": true,
+            "solid_reactive_multiwide": true,
+            "solid_reactive_cross": true,
+            "solid_reactive_multicross": true,
+            "solid_reactive_nexus": true,
+            "solid_reactive_multinexus": true,
+            "splash": true,
+            "multisplash": true,
+            "solid_splash": true,
+            "solid_multisplash": true
+        },
+        "layout": [
+            { "flags": 4, "matrix": [0, 0], "x": 9, "y": 6 },
+            { "flags": 4, "matrix": [0, 1], "x": 28, "y": 6 },
+            { "flags": 4, "matrix": [0, 2], "x": 46, "y": 6 },
+            { "flags": 2, "x": 56, "y": 6 },
+            { "flags": 4, "matrix": [0, 3], "x": 65, "y": 6 },
+            { "flags": 4, "matrix": [0, 4], "x": 84, "y": 6 },
+            { "flags": 4, "matrix": [0, 5], "x": 102, "y": 6 },
+
+            { "flags": 4, "matrix": [1, 5], "x": 102, "y": 19 },
+            { "flags": 2, "x": 93, "y": 12 },
+            { "flags": 4, "matrix": [1, 4], "x": 84, "y": 19 },
+            { "flags": 4, "matrix": [1, 3], "x": 65, "y": 19 },
+            { "flags": 4, "matrix": [1, 2], "x": 46, "y": 19 },
+            { "flags": 4, "matrix": [1, 1], "x": 28, "y": 19 },
+            { "flags": 2, "x": 18, "y": 12 },
+            { "flags": 4, "matrix": [1, 0], "x": 9, "y": 19 },
+
+            { "flags": 4, "matrix": [2, 0], "x": 9, "y": 32 },
+            { "flags": 4, "matrix": [2, 1], "x": 28, "y": 32 },
+            { "flags": 4, "matrix": [2, 2], "x": 46, "y": 32 },
+            { "flags": 4, "matrix": [2, 3], "x": 65, "y": 32 },
+            { "flags": 4, "matrix": [2, 4], "x": 84, "y": 32 },
+            { "flags": 4, "matrix": [2, 5], "x": 102, "y": 32 },
+
+            { "flags": 4, "matrix": [3, 5], "x": 102, "y": 44 },
+            { "flags": 2, "x": 93, "y": 44 },
+            { "flags": 4, "matrix": [3, 4], "x": 84, "y": 44 },
+            { "flags": 4, "matrix": [3, 3], "x": 65, "y": 44 },
+            { "flags": 2, "x": 56, "y": 44 },
+            { "flags": 4, "matrix": [3, 2], "x": 46, "y": 44 },
+            { "flags": 4, "matrix": [3, 1], "x": 28, "y": 44 },
+            { "flags": 2, "x": 18, "y": 44 },
+            { "flags": 4, "matrix": [3, 0], "x": 9, "y": 44 },
+
+            { "flags": 4, "matrix": [4, 0], "x": 9, "y": 57 },
+            { "flags": 4, "matrix": [4, 1], "x": 28, "y": 57 },
+            { "flags": 4, "matrix": [4, 2], "x": 46, "y": 57 },
+            { "flags": 4, "matrix": [4, 3], "x": 65, "y": 57 },
+            { "flags": 4, "matrix": [4, 4], "x": 81, "y": 57 },
+            { "flags": 4, "matrix": [4, 5], "x": 105, "y": 57 },
+
+            { "flags": 4, "matrix": [5, 0], "x": 121, "y": 6 },
+            { "flags": 4, "matrix": [5, 1], "x": 140, "y": 6 },
+            { "flags": 4, "matrix": [5, 2], "x": 158, "y": 6 },
+            { "flags": 2, "x": 168, "y": 6 },
+            { "flags": 4, "matrix": [5, 3], "x": 177, "y": 6 },
+            { "flags": 4, "matrix": [5, 4], "x": 196, "y": 6 },
+            { "flags": 4, "matrix": [5, 5], "x": 214, "y": 6 },
+
+            { "flags": 4, "matrix": [6, 5], "x": 214, "y": 19 },
+            { "flags": 2, "x": 205, "y": 12 },
+            { "flags": 4, "matrix": [6, 4], "x": 196, "y": 19 },
+            { "flags": 4, "matrix": [6, 3], "x": 177, "y": 19 },
+            { "flags": 4, "matrix": [6, 2], "x": 158, "y": 19 },
+            { "flags": 4, "matrix": [6, 1], "x": 140, "y": 19 },
+            { "flags": 2, "x": 130, "y": 12 },
+            { "flags": 4, "matrix": [6, 0], "x": 121, "y": 19 },
+
+            { "flags": 4, "matrix": [7, 0], "x": 121, "y": 32 },
+            { "flags": 4, "matrix": [7, 1], "x": 140, "y": 32 },
+            { "flags": 4, "matrix": [7, 2], "x": 158, "y": 32 },
+            { "flags": 4, "matrix": [7, 3], "x": 177, "y": 32 },
+            { "flags": 4, "matrix": [7, 4], "x": 196, "y": 32 },
+            { "flags": 4, "matrix": [7, 5], "x": 214, "y": 32 },
+
+            { "flags": 4, "matrix": [8, 5], "x": 214, "y": 44 },
+            { "flags": 2, "x": 205, "y": 44 },
+            { "flags": 4, "matrix": [8, 4], "x": 196, "y": 44 },
+            { "flags": 4, "matrix": [8, 3], "x": 177, "y": 44 },
+            { "flags": 2, "x": 168, "y": 44 },
+            { "flags": 4, "matrix": [8, 2], "x": 158, "y": 44 },
+            { "flags": 4, "matrix": [8, 1], "x": 140, "y": 44 },
+            { "flags": 2, "x": 130, "y": 44 },
+            { "flags": 4, "matrix": [8, 0], "x": 121, "y": 44 },
+
+            { "flags": 4, "matrix": [9, 0], "x": 121, "y": 57 },
+            { "flags": 4, "matrix": [9, 1], "x": 140, "y": 57 },
+            { "flags": 4, "matrix": [9, 2], "x": 158, "y": 57 },
+            { "flags": 4, "matrix": [9, 3], "x": 177, "y": 57 },
+            { "flags": 4, "matrix": [9, 4], "x": 196, "y": 57 },
+            { "flags": 4, "matrix": [9, 5], "x": 214, "y": 57 }
+        ],
+        "sleep": true
+    }
+}
diff --git a/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.c b/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.c
new file mode 100644
index 00000000..a85f3657
--- /dev/null
+++ b/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.c
@@ -0,0 +1,28 @@
+#include "./layers.h"
+
+bool NUM_latched = false;
+
+layer_state_t layer_state_set_user(layer_state_t state) {
+    // // NUM latching
+    // if (NUM_latched) {
+    //     if (IS_LAYER_ON_STATE(state, _SYM) && IS_LAYER_ON_STATE(state, _NAV)) {
+    //         state |= 1 << _NUM; // turn on NUM
+    //     } else {
+    //         // if both NAV and SYM are off, de-latch NUM
+    //         if (!IS_LAYER_ON_STATE(state, _SYM) && !IS_LAYER_ON_STATE(state, _NAV)) {
+    //             NUM_latched = false;
+    //         }
+    //         // since both layers aren't held, turn off NUM
+    //         state &= ~(1 << _NUM);
+    //     }
+    // } else if (IS_LAYER_ON_STATE(state, _NUM)) {
+    //     NUM_latched = true;
+    //     // turn on NAV and SYM too, since the layer keys were consumed by the combo activation
+    //     state |= 1 << _NAV | 1 << _SYM;
+    // }
+
+
+    // return state;
+
+    return update_tri_layer_state(state, _SYM, _NAV, _NUM);
+}
diff --git a/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.h b/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.h
new file mode 100644
index 00000000..07fbdde7
--- /dev/null
+++ b/keyboards/keebio/nyquist/rev4/keymaps/drew/layers/layers.h
@@ -0,0 +1,16 @@
+#pragma once
+
+#include QMK_KEYBOARD_H
+#include <stdbool.h>
+
+enum {
+    _BASE,
+    _GAME,
+    _SH_ARROW,
+    _SYM,
+    _NAV,
+    _NUM,
+    _FUNC,
+};
+
+extern bool NUM_latched;
\ No newline at end of file