After the post in the topic regarding spray booths, I thought I'd mention my turntable.
All it is is a piece of19mm chip board, about 450mm diameter. I fitted 4 small casters under it, and a 12mm (1/2") bolt protruding about 50mm (2" ) from the bottom. The bolt drops into a hole in the centre of a bench. It can easily be removed and replaced as needed.