New member here. Recently switched to S scale after years in N. My layout got too big and trains too small
Anyway, banjoflyer, here's a link to prototype photos of the Katy cylindrical hopper in red.
http://www.rr-fallenflags.org/mkt/bkty1009abp.jpg
and a link to the same type of hopper in John Deere green.
http://www.rr-fallenflags.org/mkt/bkty1010abp.jpg