So, I got a bunch of nice templates from G&W, including these: https://guitarsandwoods.com/templates/acrylic-generic-backplates-templates-set-round.html However, they are only 5mm thick, which creates an issue I didn't foresee. I can't, for the life of me, figure out how to route the cavity lip. The shortest pattern bit I have is 1/4" that I got this week for routing pickup cavities. But this only needs to be as deep as the thickness of whatever control cavity plastic I get (3mm?). So, need some help how to solve this. Thanks!