Made from a (Pro Form XP 650e) treadmill frame. I narrowed the base, cut the uprights down 2" and moved them to the top of the frame (they were where the end plates are now). I'd planned to use the treadmill handle supports, since they were already horizontal, but it was easier to replace them than to reinforce them. A little bit more of the frame worked for that. The wheels and rubber feet are where they were originally. The upper cross brace triples as a holder for the shrinker/stretcher handles and a handle when moving the thing.
It's top-heavy, so I'll have to add some weight at the bottom.
I decided to paint it with an 80s-style BMX color theme. Rustoleum 2X Key Lime, Spa Blue and Berry Pink, with white pinstripe between bands of color. The idea wasn't to be beautiful, but to be vibrant in an otherwise drab garage.
I'll add a stainless steel step cover for the bottom frame, and some plugs for the square tubing, and call this one done.