I built my own rotary jig a while back, was on the order of Ed Bakers. Worked fine, just needed to prove to myself that I could build one and make it work with just left over wood I had lay'n around. But I'm not much into round carvings as I am making signs and lithopanes with shadowboxes. But was fun doing the R&D and seeing it work.
CarverJerry
ver. 1.188 Win 7- 64b with 6 GB ram @ 2.8Ghz and dual 1Tb hard drives. Rock Chuck & Ringneck vacuum system hooked up to a Harbor Freight large vacuum. Center line text, conforming vectors.