diff --git a/users/timfee/config.h b/users/timfee/config.h
index 7e765538..f75804a5 100644
--- a/users/timfee/config.h
+++ b/users/timfee/config.h
@@ -15,6 +15,17 @@
 #define COMBO_TERM 40
 #define COMBO_ONLY_FROM_LAYER 0
 
-// ── OLED ──
+// ── OLED (matches Keebart vial_oled reference) ──
+#define OLED_IC OLED_IC_SSD1312
+#define OLED_DISPLAY_128X64
+#define OLED_FLIP_SEGMENT
+#define OLED_DISPLAY_ADDRESS 0x3C
+#define OLED_CHARGE_PUMP_VALUE 0x72
+#define OLED_BRIGHTNESS 64
+#define OLED_TIMEOUT 0
+#define OLED_FADE_OUT
+
+// ── Split sync ──
 #define SPLIT_OLED_ENABLE
 #define SPLIT_WPM_ENABLE
+#define SPLIT_LAYER_STATE_ENABLE
diff --git a/users/timfee/rules.mk b/users/timfee/rules.mk
index 260c9eb0..6960764d 100644
--- a/users/timfee/rules.mk
+++ b/users/timfee/rules.mk
@@ -1,3 +1,5 @@
 COMBO_ENABLE = yes
 WPM_ENABLE = yes
 OLED_ENABLE = yes
+OLED_DRIVER = ssd1306
+OLED_TRANSPORT = i2c
diff --git a/users/timfee/timfee.c b/users/timfee/timfee.c
index 01cf5f72..5f276023 100644
--- a/users/timfee/timfee.c
+++ b/users/timfee/timfee.c
@@ -127,14 +127,11 @@ uint16_t get_quick_tap_term(uint16_t keycode, keyrecord_t *record) {
     }
 }
 
-// ── OLED display ──
+// ── OLED display (rotation matches Keebart vial_oled reference) ──
 #ifdef OLED_ENABLE
 
 oled_rotation_t oled_init_user(oled_rotation_t rotation) {
-    if (!is_keyboard_master()) {
-        return OLED_ROTATION_180;
-    }
-    return rotation;
+    return OLED_ROTATION_90;
 }
 
 static void render_layer(void) {
@@ -180,7 +177,7 @@ static void render_wpm(void) {
 }
 
 bool oled_task_user(void) {
-    if (is_keyboard_master()) {
+    if (is_keyboard_left()) {
         render_layer();
         render_keycode();
         render_wpm();