If I was modeling an earlier era....

[Sumpter250]

See...You can have an excuse for having a Consolidation parked amongst SD70's, C44's.....just a little harder to explain why one SD70 is tied up in the roundhouse with Berks, Mountains, Niagras, Allegheny's and Cab Forwards.

Call it "The not too often seen, long lost cousin, came to visit"

I like the concept of "The Heritage fleet".