This is the basic track plan that I will be building. I have gone with a narrower shelf than I had originally planned to allow the center of the room to remain open for flying micro helicopters and racing mini R/C cars this winter. This plan still gives me plenty of switching but, still leaves the rest of the room open for me to enjoy my other hobbies during the cold weather.
The room has finally progressed to the point where I can start to put brackets for benchwork. The lower deck will contain my On30 module and will eventually expand around the room. It is just right to be operated from my rolling desk chair.
The upper deck will be HO and I am tentatively building from this plan.
I also spent a bit of time at the bench doing some more detailing, including eye bolts on my GP7s and GP7rs.