Larry, I doubt I'll be adding the sidways swing to the wood cab kits. From my standpoint, the jury is still out on whether the sideways swing roof is any good. I prefer the roofs that hinge forward, so I can get my hand in under the roof and control the engine manually through the yards and switches. My concern is the sideways swing may hit an train on an inside track. The lift off roof of our kits is a simple cork in the bottle type thing.
I dont know which drawings Acc used, maybe the drawing in the Macgregor book, but the cab is not the same. The earlier prototype seemed to have an overshort wheel base, which was fixed before even the Disney versions went out. Other than the cab setup for a later era version, the proportions look good. I think they're a pretty good buy for what you get, and in terms of decoration, they really exceeded my expectations, they did a really great job of them.
David.