Hello everyone. Well, I've been working a little on my first scratchbuild (grain elevator in N scale). I would like to use corrugated metal for the roof, but this leads me into a world i have not delved into yet...that's right styrene. Can anyone tell me what size styrene corrugated metal will look proportionate and will work for n scale roofs, and buildings in general? I know evergreen has them all listed neatly but I'm new at this and i can't afford to order a bunch of different sizes until I get it right. Any help would be appreciated.