I like having a crossover in the middle so I moved one yard line to the opposite side and attached them with two more switches. The curved siding is longer and you could also curve the opposing one as well. I had to add the inverted quarter curves which could be problematic, but it kept me from having to alter your existing inner and outer curves. I also noticed you had matching pairs of 1 3/4 inch pieces on the inner curves. You know those make excellent center rail isolators because the red wire is easily removed from the bottom. It just means you could shut off the curves while working with the sidings.
