I worked on the grades and minimum vertical clearance in this revision. Grades are now consistent at either 4% or 3%, which makes it easy to build smooth and consistent grades with Woodland Scenics risers and inclines. The crest is now at 8.25" on the Fastrack mainline, just north of the curved trestle, which should give a nice scenic view. Minimum vertical clearance is now 6", which will be just fine for this layout of traditional and Lionchief type locos.
I have considered making the On30 an "up and over" rather than figure-8, but the grades will be quite steep. I may work on it to see.