square([lidoverlap + innertube + tubesealrad,
lidoverhang + innertube + ceilth]);
square([tubesealrad*2 + innertube + lidoverlap,
square([lidoverlap + innertube + tubesealrad,
lidoverhang + innertube + ceilth]);
square([tubesealrad*2 + innertube + lidoverlap,