diff --git a/user_settings_clean.cfg b/user_settings_clean.cfg
index 9f15045..2bff7bb 100644
--- a/user_settings_clean.cfg
+++ b/user_settings_clean.cfg
@@ -41,6 +41,17 @@ sensor_mcu: cartographer
 min_temp: 5
 max_temp: 105
 
+# ============================================================================
+# EXTRUDER CONFIGURATION
+# ============================================================================
+# Default pressure_advance for Bambu Lab Hotend (calibrated value)
+# Individual filament profiles in Orca Slicer will override this value
+# ============================================================================
+
+[extruder]
+pressure_advance: 0.045              # Default: PLA with Bambu Hotend
+pressure_advance_smooth_time: 0.040  # Default smoothing time
+
 # ============================================================================
 # OUTPUT PINS - Neptune 4 Plus
 # ============================================================================