diff --git a/Mechanical/OpenSCAD/Roamer.scad b/Mechanical/OpenSCAD/Roamer.scad
index eb8e1d5..fe24814 100644
--- a/Mechanical/OpenSCAD/Roamer.scad
+++ b/Mechanical/OpenSCAD/Roamer.scad
@@ -15,6 +15,11 @@ base = [30.0, 32.0, 6.8];
 // The extension for the SMA connectors & EG95
 base_ext = [40, 20.2, 16.5];
 
+// The dimensions of the NSCCP sim holder
+sim = [13.5, 13, 1.37];
+
+bay = [12, 8.95, 0.8];
+
 // The default wall thickness
 side_wall = 1.5;
 
@@ -320,14 +325,11 @@ module expansion_card_ext(make_printable, pcb_mount="boss_insert") {
     }
 }
 
-module screw_holders() {
-    outline = [1,5,5];
+module sim_holder() {
     difference() {
-        cube([outline[0],outline[1],outline[2]]);
-        radius = 2;
-        height = 10;
-        rotate([0,90,0]) translate([(-outline[0]*2)-0.5,outline[1]/2, (outline[2]/2)-5]) cylinder(h = height,r = radius, $fn = 64);
-        }
+        cube(sim);
+        translate([0,bay[1]-sim[1]/2+1,0]) cube(bay);
+    }
 }
 
 translate([0, -base[1], 0]) expansion_card_base(open_end = false, make_printable = true, pcb_mount="boss");
@@ -337,3 +339,5 @@ translate([-base_ext[0]+base[0]+5, -base_ext[1]-base[1], 0]) expansion_card_ext(
 translate([45, -19, 17]) rotate([180,0,0]) expansion_card_lid();
 
 //translate([-128.75, 95.8, pcb_h]) import("PCB.stl");
+
+translate([2, -31.16, 1.68]) sim_holder();