I've actually looked at alot of these stands. I've decided that I want one that is on the ground and not elevated, because I'll be doing tire balls, and I'll need all the torque I can get from my huge 160
pound body I can get.
A call to Jeff Fredette is probably a good idea. I also have a machine shop available to me, so I could probably copy his with reasonable ease if I had some sort of plan.