Thanks, Mark. Somehow I lost track of this Thread during our trip to Pittsburgh. The double-loop up-and-over has always been a favorite track-plan of mine. Those scenic backdrops you have are going to make your Pike really come alive.
The 43" high knee-walls in my train-room just don't give me enough vertical space or I'd have a variant of what you are doing. But it's all good because I'm fortunate to have the dedicated space I do have.
Because two levels of track are you thinking of a lift-out bridge? Or two separate hinge-up bridges?
I look forward to seeing your Pike take shape. 
