So any time you tighten the screws to hold the jig in position it is usually recommended to use the shorter size of Allen key and cosy the screws. No really need to tighten it down as hard as possible if not you may deform the jig. I’ve engraved BRN-four https://ghostgunner302222.sharebyblog.com/32730604/the-smart-trick-of-ghost-gunner-3-that-no-one-is-discussing