I seem to remember a thread that I think was in the ho forum in the old Gauge where someone was switching to modern diesel from steam and was asking about what railroads would be represented in the trains. I saw a U.P. local today with about 6 or 8 gons loaded with coils of steel rod. There was one S.P. gon, 2 or 3 CNW gons, and 3 or 4 MoPac gons. The built dates on one MoPac gon was 1979. Obviously, when frieght cars get to be 20 years old or more, and still are painted in the fallen flag colors, they are pretty rough. I didn't have a camera with me to get any pics, but I hope this info will be of help to someone.