diff --git a/common/config.h b/common/config.h
index 164154b..0a6f726 100644
--- a/common/config.h
+++ b/common/config.h
@@ -5,6 +5,15 @@
 
 #pragma once
 
+// we don't have any lock switches
+#undef LOCKING_SUPPORT_ENABLE
+#undef LOCKING_RESYNC_ENABLE
+
+// deactivate more features
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+#define NO_MUSIC_MODE
+
 // enable NKRO by default
 #define FORCE_NKRO
 
@@ -26,6 +35,9 @@
 #define SPLIT_MODS_ENABLE
 #define SPLIT_OLED_ENABLE
 
+// select hand configuration
+#define SPLIT_USB_DETECT
+
 //
 // underglow configuration
 //
diff --git a/common/keymap.h b/common/keymap.h
index ef712af..2af3c81 100644
--- a/common/keymap.h
+++ b/common/keymap.h
@@ -96,6 +96,17 @@ char chordal_hold_handedness(keypos_t key)
     return (key.row < MATRIX_ROWS / 2) ? 'L' : 'R';
 }
 
+bool get_chordal_hold(uint16_t tap_hold_keycode, keyrecord_t* tap_hold_record,
+                      uint16_t other_keycode, keyrecord_t* other_record) {
+    // Allow hold between any pair of mod-tap keys.
+    if (IS_QK_MOD_TAP(tap_hold_keycode) && IS_QK_MOD_TAP(other_keycode)) {
+        return true;
+    }
+
+    // Otherwise defer to the opposite hands rule.
+    return get_chordal_hold_default(tap_hold_record, other_record);
+}
+
 #ifndef CC_NO_LED
 
 void keyboard_post_init_user(void) {
@@ -147,3 +158,14 @@ layer_state_t layer_state_set_user(layer_state_t state) {
 }
 
 #endif
+
+// Simplify unused magic config functions
+#ifndef MAGIC_ENABLE
+uint8_t mod_config(uint8_t mod) { return mod; }
+uint16_t keycode_config(uint16_t keycode) { return keycode; }
+#endif
+
+// Reduce marix scanning delay
+#ifndef DIRECT_PINS
+void matrix_io_delay(void) { __asm__ volatile("nop\nnop\nnop\n"); }
+#endif
diff --git a/rules.mk b/rules.mk
index 4b9859f..dc1f7b2 100644
--- a/rules.mk
+++ b/rules.mk
@@ -1,8 +1,20 @@
 # Enable N-Key Rollover
 NKRO_ENABLE = yes
 
+# less features we don't use
+COMMAND_ENABLE = no
+CONSOLE_ENABLE = no
+GRAVE_ESC_ENABLE = no
+MAGIC_ENABLE = no
+MOUSEKEY_ENABLE = no
+MUSIC_ENABLE = no
+SPACE_CADET_ENABLE = no
+
 # add bongocat & luna for OLEDs
 ifeq ($(strip $(OLED_ENABLE)), yes)
     SRC += features/oled_bongocat.c
     SRC += features/oled_luna.c
 endif
+
+# good optimizations
+LTO_ENABLE = yes