I have the template for reg marks on my letter size PNC that I downloaded from here, I read here that you need to ungroup and move two at a time so that they are all perfectly aligned, what I could not find is how far from the edge they need to be. I looked and searched everywhere. I got a new printer, epson 1430, and it prints borderless at 12x12, but not borderless at 8.5x11. So I was able to move them and align them but not sure how far from border to put the reg marks. This is for inkscape and signcut!
THANKS!