The New 3D Printing Thread

Hey, thanks for the link to your designs, there's some interesting models there. I especially like the look of the class 08 Diesel shell, what chassis is this (and the others) designed to fit onto? Are they specific Tomy chassis or the generic new (some might say crappy) FP chassis?

Any other new ones coming? On a sort of related note, have you seen any models posted for Scalextric on Thingiverse? I've not been on there for ages due to lack of time to search it, but I may be interested if there are any...