case battery switch hole

case.scad

@@ -24,6 +24,9 @@ rim_extra_height = 3.0;
 
 pillar_dia = 3; 
 
+back_hole_dia = 15.5;    
+hole_to_holder_gap = 10.0;
+
 case_w = plate_w + (wall_thickness * 2) + (clearance * 2) - 2;
 case_h = ((plate_h - 2) * cos(case_angle)) + (wall_thickness * 2) + (clearance * 2);
 
@@ -49,6 +52,22 @@ clip_width = 10.0;
 clip_depth = 1.5;
 clip_height = 1.5; 
 
+module back_wall_hole() {
+    // 1. Locate the left edge of the controller holder assembly
+    holder_left_edge = usb_x_offset + (usb_w/2) - (holder_x/2) - holder_wall;
+    
+    // 2. Calculate X center: (Left Edge - Gap - Radius)
+    x_pos = holder_left_edge - hole_to_holder_gap - (back_hole_dia / 2);
+
+    // 3. Calculate Z center (Bottom of hole touching the floor)
+    z_pos = floor_thickness + (back_hole_dia / 2);
+
+    // 4. Create the cutout
+    translate([x_pos, case_h - wall_thickness - 1, z_pos])
+        rotate([-90, 0, 0])
+            cylinder(d = back_hole_dia, h = wall_thickness + 2, $fn = 64);
+}
+
 module controller_holder() {
     x_pos = usb_x_offset + (usb_w/2) - (holder_x/2) - holder_wall;
     y_inner_wall = case_h - wall_thickness;
@@ -174,6 +193,7 @@ if (render_part == "left" || render_part == "both") {
             case_full_geometry();
             jigsaw_cutter(-joint_clearance); 
             usb_cutout();
+            back_wall_hole();
         }
         controller_holder(); 
     }