Geeezus Kellan, a 3 decker, wow!. You're not pulling any punches this time are you?
I like the plan, should be a fun build, looks like plenty of space, and lot's of operating potential.
The only thing I see is potential hazard are the helix's. Make sure you don't limit yourself with train length on those. What is the grade on them anyways?
They could be hard as heck to build also...