I need to make some parts that are going to need to be routed on both sides. I am cutting a number of grooves on one side, then flipping the sheet and cutting out my parts on the other. Despite carefully registering my sheet when I flip it, I am consistently off by about 1/8". I keep going back to my CAD files, but they seem to be dead on. I have also moved my bot around checking to make sure it is lined up with the corners of my sheet, and it too looks perfect.

Has anyone ever done this, and if so, do you have any tips for getting both sides to line up?

Andrew