Dan, I’m looking at your pictures and saying to myself, “This can’t be right; there’s no room to work on the locomotives in that engine shed. It’s too narrow for any work. He’s got his all wrong.” (I’m building an engine shed myself, so I’m following your build with great interest.)
So I look around on the internet and in some books I have here, and what do I find? Some narrow and tight quarters for engines, indeed:
In fact, the only examples I found of single- and double-track engine houses with plenty of room to work and shops attached were actually models, not prototypes:
So there you go. Looking forward to the next set of pictures.