In an attempt to cut a large radius nosing for some mantels I’m making, I’m in process of making a router trammel to support the bit in a constant arc. Made from 3/4 ply, my inspiration is based off an old Fine Woodworking article and tablesaw trunions. I still need to mount it to a stable base, fit a router and bit and the fire it up…
I’ll post more when I make some sawdust.
-- Anybody can become a woodworker, but only a Craftsman can hide his mistakes.