add a comment that is all that survived some experimentation

src/components.scad

@@ -55,21 +55,21 @@ frame_y = 208;
 frame_z = 50;
 
 // depth of the "lip" of the frame that the top plate sets into/supports the overhang
-frame_wall = 8;
+frame_wall = 4;
 
 // per neutrik (mm)
 neutrik_panel_thickness = 3;
 
 // top plate, which can either be the whole plate ("inset") or the mounting frame for a plate that overhangs
-top_plate_x = frame_x - frame_wall;
+top_plate_x = frame_x - (frame_wall * 2);
-top_plate_y = frame_y - frame_wall;
+top_plate_y = frame_y - (frame_wall * 2);
 top_plate_z = 5;
 
 // how much the top plate x/y is expanded to overhang the frame
 // note that this is relative to the top plate (so the wall is added back)
-top_plate_overhang_amount = frame_wall + 17;
+top_plate_overhang_amount = 8.5;
-overhang_top_plate_x = top_plate_x + top_plate_overhang_amount;
+overhang_top_plate_x = top_plate_x + (frame_wall * 2) + (top_plate_overhang_amount * 2);
-overhang_top_plate_y = top_plate_y + top_plate_overhang_amount;
+overhang_top_plate_y = top_plate_y + (frame_wall * 2) + (top_plate_overhang_amount * 2);
 
 plate_to_frame_point_x = (top_plate_x/2)-10;
 plate_to_frame_point_y = (top_plate_y/2)-10;
@@ -276,6 +276,7 @@ module top_plate_with_raised_overhang() {
 module frame_box() {
 	difference() {
 		roundedcube([frame_x, frame_y, frame_z], center=true, radius=3);
+		// cut out the middle to make it a box
 		cube([top_plate_x-(panel_support_width*2), top_plate_y-(panel_support_width*2), frame_z+5], center=true);
 	}
 }