Here is mine Larry, it is my third, each time I improved it a little based on the shortcomings of the prior one. The ring is made of three layers of 3/4 ply. one layer of the ply is cut away to make a track for the arms. Used some Rockler knobs to secure the arms. Used allthread and a wood bottom plate (not shown) to secure the rig to the ways, about 14" diameter capacity. 5 arms might seem like overkill, but I don't regret it, I hollow a lot of gnarly stuff and I like the added stability. Only complaint I have with this one is humidity can cause the arms to bind in their track sometimes... oh yea, the wheels are roller blade wheels, picked em up cheap at Goodwill....
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