I always wondered if you could route out a square with round edges, then cut some different peices of ply to fit flush using a little frame under to hold it level.
Then drill one of those peices to your exact requirements, and if they change drill another.
YES! I worked out what you meant. Yeah basically a chamfered edge or something, I have asked a pal to do some for me as he has all the tools, hopefully he will be able to, just a question of numbers. Thinking two now.
I always wondered if you could route out a square with round edges, then cut some different peices of ply to fit flush using a little frame under to hold it level.
Then drill one of those peices to your exact requirements, and if they change drill another.
Then
Basically a nice looking version of this