head_filename = "head.stl"; head_adjust_x = 0; head_adjust_y = 0; difference() { union() { translate([head_adjust_x, head_adjust_y, 0]) { import(head_filename, convexity=30); } translate([0, 5, 20/2]) cube(size=[17, 10, 20], center=true); translate([0, 8, 22/2]) cube(size=[7, 16, 22], center=true); } import("pez_negative.stl", convexity=30); }