diff --git a/prusa_enclosure_mount_top_right.scad b/prusa_enclosure_mount_top_right.scad
index c1d1ebf..74fd80e 100644
--- a/prusa_enclosure_mount_top_right.scad
+++ b/prusa_enclosure_mount_top_right.scad
@@ -35,6 +35,12 @@ module prusa_enclosure_mount_top_right() {
                         [0, -3.235],
                         [-2.8, -1.6175],
                     ]);
+
+                    // Underside washer alignment cutouts
+                    for (y = [-4, 4]) {
+                        translate([124, y, 0])
+                        cube([2, 2, 2], center=true);
+                    }
                 }
             }
 
@@ -68,4 +74,4 @@ module prusa_enclosure_mount_top_right() {
     }
 }
 
-prusa_enclosure_mount_top_right();
\ No newline at end of file
+prusa_enclosure_mount_top_right();
diff --git a/prusa_enclosure_mount_washer.scad b/prusa_enclosure_mount_washer.scad
new file mode 100644
index 0000000..5512ed3
--- /dev/null
+++ b/prusa_enclosure_mount_washer.scad
@@ -0,0 +1,18 @@
+module prusa_enclosure_mount_washer() {
+    difference() {
+        // Base
+        cube([8.9, 14, 1.5]);
+
+        // Through screw hole
+        translate([3.5, 7, -1])
+        cylinder(h=3.5, d=3.2, $fn=50);
+    }
+    
+    translate([7.5, 3, 2])
+    cube([2, 2, 1], center=true);
+    
+    translate([7.5, 11, 2])
+    cube([2, 2, 1], center=true);
+}
+
+prusa_enclosure_mount_washer();
\ No newline at end of file