Bob-
Thanx so much for the great pix- very considerate! Looks like BSL had an unusually colorful heritage. Leaning toward the green because I'm guessing PTC was trying to match its surface fleet- hence the question about timing. If I can get this project close to acceptable, I'll show you the result.
Would have been so much easier if only IHP/Shapeways had followed up on an earlier O-scale prewar Broad Street they had actually produced!
Best wishes.