diff --git a/lower_case.png b/lower_case.png
index e148246..d3b73a3 100644
Binary files a/lower_case.png and b/lower_case.png differ
diff --git a/lower_case.scad b/lower_case.scad
index 0a6f248..adf56ed 100644
--- a/lower_case.scad
+++ b/lower_case.scad
@@ -34,9 +34,9 @@ color("SaddleBrown") difference() {
   
   // USB-C daughter board
   translate([pcb_width/2-pcb_radius, pcb_depth-pcb_radius+1-pololu_depth/2, case_bottom_thickness - pcb_thickness/2]) {
-    translate([0,pololu_depth/2-case_thickness+3,0.8+3/2]) rotate([-90,0,0]) hull() {
-      translate([-6/2,0,0]) cylinder(h=case_thickness+2, d=6);
-      translate([6/2,0,0]) cylinder(h=case_thickness+2, d=6);
+    translate([0,pololu_depth/2-case_thickness+5,0.8+3/2]) rotate([-90,0,0]) hull() {
+      translate([-7/2,0,0]) cylinder(h=case_thickness+2, d=8);
+      translate([7/2,0,0]) cylinder(h=case_thickness+2, d=8);
     }
     cube([pololu_width, pololu_depth, pcb_thickness+0.1], center=true);
     // screw holes
diff --git a/util.scad b/util.scad
index 1219e23..fbc947f 100644
--- a/util.scad
+++ b/util.scad
@@ -26,7 +26,7 @@ mounting_holes = [
 ];
 
 pololu_width = 0.8*2.54*10;
-pololu_depth = 0.5*2.54*10;
+pololu_depth = 0.5*2.54*10+1;
 pololu_holes_radius = 1;
 pololu_hole_spacing = 0.1*2.54*10;