Ello ello,
First time posting here, and I thought I'd start with something obscure but interesting, a 3D model of the British Railways ACV Lightweight Railcar, built in 1952. These funky little things were usually found in a 3 car formation, Driver Motor Third, Trailer Third and Driver Motor Brake Third (although the DMT and DMBT could run alone or in a 2 car formation with a TT, DMT or DMBT).
I did make a model of this a while ago, but looking at it I could have very much done better. They may have been called the 'Flying Bricks' but they still had alot to them!
(And yes, the nickname 'Flying Brick' was a thing, you're welcome for this info)