Thanks for posting Swinks.
I like the design and has given me some ideas to improve on it. I've already got 1 of the metal rotisserie ones and 2 of the 'El Nino' wood playfield stands.
I have 6 playfield swaps lined up as things are incredibly busy down here
and I can see the benefits of the trolley type already. I think its more for workshop type situations rather than the 'once every few years' playfield swap.
You could easily fit a blank piece of ply into where the playfield normally sits and use it as a storage unit or trolley when not required.