diff --git a/src/stitching_scanner.py b/src/stitching_scanner.py
index 08ee18c..212f63f 100644
--- a/src/stitching_scanner.py
+++ b/src/stitching_scanner.py
@@ -165,11 +165,6 @@ class StitchingScanner:
         h_base, w_base = base.shape[:2]
         h_strip, w_strip = strip.shape[:2]
         
-        # === DEBUG MAGIC NUMBERS (append_left only) ===
-        DEBUG_SHIFT_RIGHT = 50   # Positive = shift strip right
-        DEBUG_SHIFT_UP = 50      # Positive = shift strip up
-        # =============================================
-        
         # Clamp y_offset
         y_offset = max(0, min(y_offset, h_base - h_strip))
         blend_w = min(blend_width, w_strip, w_base)
@@ -208,20 +203,12 @@ class StitchingScanner:
             if x_offset is None:
                 x_offset = 0
             
-            # Apply debug shifts
-            x_offset = x_offset + DEBUG_SHIFT_RIGHT
-            y_offset = y_offset - DEBUG_SHIFT_UP
-            
-            # Clamp y_offset after debug adjustment
-            y_offset = max(0, min(y_offset, h_base - h_strip))
-            
             # Clamp x_offset to valid range
-            x_offset = max(0, min(x_offset, w_base - blend_w))
+            x_offset = 0 - min(x_offset, w_base - blend_w)
             
             self.log(f"=== _blend_horizontal_at_y (append_left) ===")
             self.log(f"  base: {w_base}x{h_base}, strip: {w_strip}x{h_strip}")
             self.log(f"  x_offset: {x_offset}, y_offset: {y_offset}, blend_w: {blend_w}")
-            self.log(f"  DEBUG: shift_right={DEBUG_SHIFT_RIGHT}, shift_up={DEBUG_SHIFT_UP}")
             
             # Result is same size as base (no expansion when going left)
             result = base.copy()