Hi Paul,
I think I worked on that plan.
The problem with that up and over is the reverse loop is elevated to a desired height. The slope (ascent\descent) is the long run at the top with the switch.
That forces extending the mountain work out to the switch at least for support.
That leaves with a say 6.5"in 11' or 6.5/132 or a 4.9% slope or grade. Extend the slope around the right side curves lessened it some, but your dealing with two tracks being elevated.
I came up with double 45° crossovers where you see the track cross the two tracks to keep everything level.
The right side leaves plenty of room for sidings, industry or city\town.
Well, I can't find the layout now. I'll keep looking.
How do want to go with this? 4.5%-5% grade ok?
