diff --git a/Mechanical/OpenSCAD/Roamer.scad b/Mechanical/OpenSCAD/Roamer.scad
index fe24814..6d985c4 100644
--- a/Mechanical/OpenSCAD/Roamer.scad
+++ b/Mechanical/OpenSCAD/Roamer.scad
@@ -314,7 +314,7 @@ module expansion_card_ext(make_printable, pcb_mount="boss_insert") {
 
         }
         // hollow bottom to provide room for back of board
-        translate([(base_ext[0]-base[0])/2+side_wall,base_ext[1]-base_ext[1]/2+side_wall,-hollow_bottom_z+1.5]) cube([base[0]-side_wall*2, (base_ext[1]/2)-side_wall, hollow_bottom_z]);
+        translate([(base_ext[0]-base[0])/2+side_wall,base_ext[1]-base_ext[1]/2+gap*2,-hollow_bottom_z+1.5]) cube([base[0]-side_wall*2, base_ext[1]/2, hollow_bottom_z]);
     }
 
     difference() {
@@ -336,8 +336,8 @@ translate([0, -base[1], 0]) expansion_card_base(open_end = false, make_printable
 
 translate([-base_ext[0]+base[0]+5, -base_ext[1]-base[1], 0]) expansion_card_ext(make_printable = true, pcb_mount="boss");
 
-translate([45, -19, 17]) rotate([180,0,0]) expansion_card_lid();
+//translate([45, -19, 17]) rotate([180,0,0]) expansion_card_lid();
 
-//translate([-128.75, 95.8, pcb_h]) import("PCB.stl");
+translate([-128.75, 95.8, pcb_h]) import("PCB.stl");
 
-translate([2, -31.16, 1.68]) sim_holder();
+//translate([2, -31.16, 1.68]) sim_holder();
diff --git a/Mechanical/OpenSCAD/Roamer.stl b/Mechanical/OpenSCAD/Roamer.stl
index aaf9395..1c505ef 100644
Binary files a/Mechanical/OpenSCAD/Roamer.stl and b/Mechanical/OpenSCAD/Roamer.stl differ