Hey, this may seem like a stupid question, but I was wondering what methods you guys used to make sure your piece is always exactly where you want it when you're going ahead with the cut or engrave on a piece that cannot go wrong. What I did was draw a 50mm line along Xzero and the same against Yzero to form a right angle, and then engraved this into the aluminium base-plate. I then layered four or five layers of masking tape along these lines so that I can push my wood/card/material up into this corner to find exactly zero.
It's not perfect but I think that is down to the straightness of my masking tape.
I just wanted to know what other methods people use.