To solve the sinking problem I sank the ring down into the floor, I'm going for a bare knuckle style anyhow so it sort of looks ok. The spine-tracking seems to be working with these characters (or maybe Lee fixed it in the latest Beta) so I'm going to try and do this one with them as characters and see how far I get.
I had the idea that this could be a stand-alone piece within an adventure game or RPG, maybe a way of making money by betting on which boxer wins sort of thing. If it works really well I'll add an audience and stuff.
Been there, done that, got all the T-Shirts!