I began with 2×2 angle iron, welding them together to form the floor frame. I criss-crossed from side to side with 1 ½" steel tubing which formed a 1' square in the center. Then this frame was set onto the wheel hub and welded into place. more angle iron was welded across at a 45° on each corner, to which the casters were attached. The coasters had to be shimmed to floor level. Then using old bedframes I put together the wall frames, also framing in a place for the bi-fold doors. The frame was rather flimsy until I screwed on the paneling (layed down sideways). I didnt put in a ceiling. To keep people from crowding into corners I put rails across each one (the corners, not the people, although...)The finishing touches consists of a signal bell (to let the spinner know when to start spining) and a step.
If I got you confused, or you have any comments or questions,
don't hesitate to concatact me at beasleys@brightok.net.