From the far, far reaches of the wild, wild west I am: rtpoteet
Elmer.
The above is my opinion, from an active and experienced Model Railroader in N scale and HO since 1961.
(Modeling Freelance, Eastern US, HO scale, in 1962, with NCE DCC for locomotive control and a stand alone LocoNet for block detection and signals.) http://waynes-trains.com/ at home, and N scale at the Club.
QUESTION? When did roll up doors come into use for roundhouses, freight doors etc.
Thanks MARK