Instructions
Cut one copy of the outer circles, and 2 copies of the inner circle file. The rest is pretty forward (although I recommend a touch of glue or a more snug fit than what I have made). Optimised for 3mm materials...
I've only made this in HDF so far, but I'd love to see what it looks like in colored acrylic!
(Better picture coming soon!)
EDIT: Better picture has arrived.



