I've never needed any such thing. Just a good, sharp, drill bit and a little tape on it to gauge the depth and run it by hand after dimpling the spot... screw in the screw and call it done![]()
With all due respect you are over thinking it.
When I am making a body i anyways mark a center line - that gets sanded off before finishing.
Use that center line to mark your strap button.
Heck you could drill for a strap button before you do the final sanding & edge routing.
I actually prefer a tele strap button slightly higher than center line.
It hangs nicer on a strap - especially if it’s a light weight body.
Nathan
You’re missing outI'm not making the bodies. And my supplier doesn't offer marks for strap buttons.