intersection(convexity=4) { translate([-5, -10, 0]) union() { linear_extrude(height=.75, convexity=4) projection(cut = true) translate([0, 0, -1]) import("GOYLE_LOWER.stl"); translate([0, 0, -.25]) import("GOYLE_LOWER.stl", convexity=4); } translate([0, 0, 20]) cube(40, center=true); }