- Thonk Jack Nut TightenerDo you find yourself struggling to tighten the nuts on those 3.5mm Thonk Jacks? Do they break your nails and hurt your fingers, forcing you to resort to pliers that inevitably slip off and scrape your beautiful PCB front panels? Do you have a 3D printer? Take 14 minutes and print this file out. It… Read more: Thonk Jack Nut Tightener