I model mostly steam to diesel era Milwaukee Road, Northern Pacific, and some Great Northern. Growing up in Miles City MT. The Milw. and N.P. ran through Miles and the G.N. about 80 miles north with a lot of their cars on the two in miles. I've researched some of the Butte Anaconda and Pacific, largely a mining short line around Butte and Anaconda MT. A very interesting rail road! However it would take an extreme amount of scratch building to model accurately model. OK I better shut up now!!