diff --git a/Makefile b/Makefile
index c5882a2..b8c55fa 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,12 @@
-.PHONY: render
+.PHONY: stl 3mf
 
-render:
+stl:
+	openscad --export-format binstl -o upper_case.stl upper_case.scad
 	openscad --export-format binstl -o lower_case.stl lower_case.scad
-	openscad --export-format 3mf -o lower_case.3mf lower_case.scad
 	openscad --export-format binstl -o plate.stl plate.scad
+
+3mf:
+	openscad --export-format 3mf -o upper_case.3mf upper_case.scad
+	openscad --export-format 3mf -o lower_case.3mf lower_case.scad
 	openscad --export-format 3mf -o plate.3mf plate.scad
+
diff --git a/README.md b/README.md
index 249220e..ebde626 100644
--- a/README.md
+++ b/README.md
@@ -1,12 +1,15 @@
+![upper case](https://gitlab.com/noisy_cricket/cad/-/raw/main/upper_case.png?inline=false)
+![plate](https://gitlab.com/noisy_cricket/cad/-/raw/main/plate.png?inline=false)
 ![lower case](https://gitlab.com/noisy_cricket/cad/-/raw/main/lower_case.png?inline=false)
 
 CAD files for noisy cricket
 ===========================
 
-Create stl and 3mf files for lower case and plate files by running (needs openscad):
+Create files for 3D printing or CNC by running this (needs openscad):
 
 ```shell
-make render
+make stl
+make 3mf
 ```
 
 ---
diff --git a/lower_case.png b/lower_case.png
index 176d149..0bdca14 100644
Binary files a/lower_case.png and b/lower_case.png differ
diff --git a/lower_case.scad b/lower_case.scad
index cbe3cfc..5d47f20 100644
--- a/lower_case.scad
+++ b/lower_case.scad
@@ -4,7 +4,7 @@ include <util.scad>
 
 $fn = 64;
 
-difference() {
+color("SaddleBrown") difference() {
   // case
   hull() {
     translate([-case_thickness, -case_thickness, 0]) cylinder(h=case_thickness+standoff_height+pcb_thickness+5, r=pcb_radius);
@@ -43,10 +43,21 @@ difference() {
     translate([-pololu_width/2+pololu_hole_spacing, pololu_depth/2-pololu_hole_spacing, -pcb_thickness/2-2]) cylinder(h=2, r=pololu_holes_radius);
     translate([pololu_width/2-pololu_hole_spacing, pololu_depth/2-pololu_hole_spacing, -pcb_thickness/2-2]) cylinder(h=2, r=pololu_holes_radius);
   }
+  
+  // screw holes for upper case
+  translate([-case_thickness, -case_thickness, 0]) cylinder(h=2, d=4);
+  translate([pcb_width-2*pcb_radius+case_thickness, -case_thickness, 0]) cylinder(h=2, d=4);
+  translate([-case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=2, d=4);
+  translate([pcb_width-2*pcb_radius+case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=2, d=4);
+  
+  translate([-case_thickness, -case_thickness, 0]) cylinder(h=case_thickness+standoff_height+pcb_thickness+5, d=2);
+  translate([pcb_width-2*pcb_radius+case_thickness, -case_thickness, 0]) cylinder(h=case_thickness+standoff_height+pcb_thickness+5, d=2);
+  translate([-case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=case_thickness+standoff_height+pcb_thickness+5, d=2);
+  translate([pcb_width-2*pcb_radius+case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=case_thickness+standoff_height+pcb_thickness+5, d=2);
 }
 
 // mounting standoffs
-for(i = [0 : len(mounting_holes)-1]) {
+color("SaddleBrown") for(i = [0 : len(mounting_holes)-1]) {
   translate([mounting_holes[i][0] - pcb_radius, mounting_holes[i][1] - pcb_radius, case_bottom_thickness]) difference() {
     cylinder(h=standoff_height, d=4);
     cylinder(h=standoff_height, d=2);
diff --git a/plate.png b/plate.png
new file mode 100644
index 0000000..512ec8c
Binary files /dev/null and b/plate.png differ
diff --git a/plate.scad b/plate.scad
index 766c1ce..c48fbd1 100644
--- a/plate.scad
+++ b/plate.scad
@@ -4,24 +4,22 @@ include <util.scad>
 
 $fn = 64;
 
-module plate() {
-  hull() {
-    cylinder(h=plate_thickness, r=pcb_radius);
-    translate([pcb_width-2*pcb_radius, 0, 0]) cylinder(h=plate_thickness, r=pcb_radius);
-    translate([0, pcb_depth-2*pcb_radius, 0]) cylinder(h=plate_thickness, r=pcb_radius);
-    translate([pcb_width-2*pcb_radius, pcb_depth-2*pcb_radius, 0]) cylinder(h=plate_thickness, r=pcb_radius);
+// projection(cut=true) 
+color("Gold") difference() {
+  union() {
+    hull() {
+      cylinder(h=plate_thickness, r=pcb_radius);
+      translate([pcb_width-2*pcb_radius, 0, 0]) cylinder(h=plate_thickness, r=pcb_radius);
+      translate([0, pcb_depth-2*pcb_radius, 0]) cylinder(h=plate_thickness, r=pcb_radius);
+      translate([pcb_width-2*pcb_radius, pcb_depth-2*pcb_radius, 0]) cylinder(h=plate_thickness, r=pcb_radius);
+    }
+
+    translate([20, pcb_depth - pcb_radius, 0]) lug();
+    translate([pcb_width-2*pcb_radius - 20, pcb_depth - pcb_radius, 0]) lug();
+    translate([20, -pcb_radius, 0]) lug(north_facing=false);
+    translate([pcb_width-2*pcb_radius - 20, -pcb_radius, 0]) lug(north_facing=false);
   }
 
-
-  translate([20, pcb_depth - pcb_radius, 0]) lug();
-  translate([pcb_width-2*pcb_radius - 20, pcb_depth - pcb_radius, 0]) lug();
-  translate([20, -pcb_radius, 0]) lug(north_facing=false);
-  translate([pcb_width-2*pcb_radius - 20, -pcb_radius, 0]) lug(north_facing=false);
-}
-
-// projection(cut=true) 
-difference() {
-  color("gold") plate();
   translate([12.7-pcb_radius, 12.7-pcb_radius, 0]) {
     mx_1x1_cutout();
     translate([mx, 0, 0]) mx_1x1_cutout();
diff --git a/upper_case.png b/upper_case.png
new file mode 100644
index 0000000..396e53a
Binary files /dev/null and b/upper_case.png differ
diff --git a/upper_case.scad b/upper_case.scad
new file mode 100644
index 0000000..be13da7
--- /dev/null
+++ b/upper_case.scad
@@ -0,0 +1,34 @@
+// This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
+
+include <util.scad>
+
+$fn = 64;
+
+color("SaddleBrown") difference() {
+  // case
+  hull() {
+    translate([-case_thickness, -case_thickness, 0]) cylinder(h=upper_case_height, r=pcb_radius);
+    translate([pcb_width-2*pcb_radius+case_thickness, -case_thickness, 0]) cylinder(h=upper_case_height, r=pcb_radius);
+    translate([-case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=upper_case_height, r=pcb_radius);
+    translate([pcb_width-2*pcb_radius+case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=upper_case_height, r=pcb_radius);
+  }
+
+  // pcb
+  hull() {
+    cylinder(h=upper_case_height+0.1, r=pcb_radius);
+    translate([pcb_width-2*pcb_radius, 0, 0]) cylinder(h=upper_case_height+0.1, r=pcb_radius);
+    translate([0, pcb_depth-2*pcb_radius, 0]) cylinder(h=upper_case_height+0.1, r=pcb_radius);
+    translate([pcb_width-2*pcb_radius, pcb_depth-2*pcb_radius, 0]) cylinder(h=upper_case_height+0.1, r=pcb_radius);
+  }
+  
+  // threaded inserts
+  translate([-case_thickness, -case_thickness, 0]) cylinder(h=3, d=3);
+  translate([pcb_width-2*pcb_radius+case_thickness, -case_thickness, 0]) cylinder(h=3, d=3);
+  translate([-case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=3, d=3);
+  translate([pcb_width-2*pcb_radius+case_thickness, pcb_depth-2*pcb_radius+case_thickness, 0]) cylinder(h=3, d=3);
+  
+  translate([20, pcb_depth - pcb_radius, 0]) lug(hole=false);
+  translate([pcb_width-2*pcb_radius - 20, pcb_depth - pcb_radius, 0]) lug(hole=false);
+  translate([20, -pcb_radius, 0]) lug(north_facing=false, hole=false);
+  translate([pcb_width-2*pcb_radius - 20, -pcb_radius, 0]) lug(north_facing=false, hole=false);
+}
diff --git a/util.scad b/util.scad
index 7a5cee4..d8dcf7a 100644
--- a/util.scad
+++ b/util.scad
@@ -12,6 +12,7 @@ plate_thickness = 1.5;
 case_thickness = 5;
 case_bottom_thickness = 5;
 case_height = 10;
+upper_case_height = 5;
 
 standoff_height = 3;