The turntable thread was getting a bit long in the tooth, so I'll concentrate on the roundhouse. I bought a sheet of .080 x 2' x 4' at Lowe's and cut the roof in one piece. I've sprayed it flat black for now, but need to think about how to finish it. I'm sure it was a tar, or roll roofing job, just need to figure how to do it. Smokejacks are in, doors are hung (non operating) some cinders down and it's time to think about the "front wall" facing the turntable pit. I don't like the way the prototype looked, so I may vary again and do it differently. That will be the last bit of repetitve piece building which I'm glad of. Still have to put the posts out front between the doors where they were secured open by the RR. Lots of interior detailing to do, lighting to install and the like. I still want to put one more short track of the pit for wheels. But this is the status as of this morning.