module RawFace() {
	import("d:/stl files/Jon-mesh-export-3 - MM Repair.stl");
	}

module Face() {
		translate([-15, -80, -20])
			rotate([0, -90, -90])
				scale(9)
					RawFace();
	}
	
module  HollowFace2()
	// thin surface hollow face
	translate([-10, 0, 0])
		rotate([0, 90, 0])
			difference() {
				Face();
				translate([0, 0, 10])
						Face();
				translate([-50, -100, 90]) cube([1000, 1000, 1000]);
				}		

HollowFace2();