bless you, Earwigger! I’ve been wanting a longworth chuck and have been unwilling to pay the high price for one. I recently bought a glowforge laser cutter and thought I’d just look and see if by some miracle anyone had made a SVG for a longworth chuck, and there it was! It worked perfect in inkscape and then i was able to easily bring it into my glowforge software and it worked beautifully. Thanks so much for sharing!!