Improved: all of the Violet is O48 min, will run O42 equipment. O42 can also run the O60 over/under figure-8. Just the O36 cut-off to make an interior circle is O36, which is just for continuous running of O36 and traditional equipment, LionChief and the like.
I like this color scheme better: Green=O60 min. Blue=O48 min. Violet=O36. Red (none) = O31.
4% grades to reach the light green bridge at 5.5".
Described as a 6x14 O48 Lionel FasTrack layout (runs O42), with the O36 cut-off, and the ability to run O54 on the over/under figure-8.