Love your idea Jack, but I have two questions. How much longer building would you need on the three longer leads? Looks like you would need a switch at the turntable for the outside track lead to the "new" engine house now being used today, is that possible? Replacing the building on the East side over the swamp with a longer building is going to take a SERIOUS retaining wall! Fun to ponder though, you could extend the back of the building to almost connect to the existing building for even more storage.
Would you backchannel me please?