@Mixy: Many thanks for the SCARM tips and links!
@DoubleDAZ: Very grateful for your "butting in" with all your expertise and suggested design. I'm a former Navy submariner but Fly High my USAF brother!
I was out of state visiting Mom and just got back. I made a lot of changes using RealTrax and got close but was still having problems fitting a 2 train, 2 layer interconnecting layout to fit in a 5'2" width. That said I tried Fastrack (which I have some of) and came up with what you see here. The short orange grade is for going down only (steep). The blue grade can be used in either direction. Again the idea is that two trains can run simultaneously while staying on their own levels (for my daughter and I). Or, the PolEx can run unattended using both loops going from blue (up grade) to pink (top) to orange (down grade) to green (lower level) while popping in and out of view a number of times in a single trip. Meanwhile, the second train would sit on the lower level siding.