I have updated the plan utilizing your suggestions. I added a hatch area as well to be able to reach the far right corner and the crossovers. I also checked the clearance at the switch by the bridge tunnel. As the pictures show, it looks like clearance won't be an issue. Even the PA-1s look ok, and they won't be running that line of tight curves. I tried Carl's wye idea, but it didn't quite work out.