diff --git a/src/bottom-panel-inset.scad b/src/bottom-panel-inset.scad
index a05721e..2a5e3c4 100644
--- a/src/bottom-panel-inset.scad
+++ b/src/bottom-panel-inset.scad
@@ -7,10 +7,7 @@ include <parameters.scad>
 include <components.scad>
 
 module bottom_panel() {
-	difference() {
-		mirror([0, 0, 1]) panel();
-		translate([0, 0, panel_z/2]) cube([panel_x-40, panel_y-40, panel_z], center=true);
-	}
+	mirror([0, 0, 1]) panel();
 }
 
 bottom_panel();
diff --git a/src/parameters.scad b/src/parameters.scad
index 0249456..51a3190 100644
--- a/src/parameters.scad
+++ b/src/parameters.scad
@@ -35,7 +35,7 @@ lever_plate_hole = 12;
 // base frame box. reminder: top of inside (including mounts) is chopped by panel_z for plates
 frame_x = 233;
 frame_y = 208;
-frame_z = 55;
+frame_z = 57;
 
 frame_center_to_neutrik = 70;