hey Jon,
I work a little differently. I place the lowest height track in Layer 0 and higher levels on up in 1, 2 and so on. I also color the levels at times to prevent "select all" moves from selecting the whole layout.
Spend some time on the flex track tool help. I messed around a little the other day on your layout.
When you look at other track systems, I used Atlas O, and hover the cursor over a track piece in the library, the radius and arc angle are shown. The exercise was to create ScaleTrax O45 curves from flex to fit on the 10' long table and leave room for the climb runs in O54 on the outside.
You will see that an O45 track has a radius of 22.5" on the center rail. You enter that in the flextool R box. Next you can make the curve the arc that you need by entering the degrees. In the degree section, a left curve requires a minus sign in front of the arc. Otherwise, it will always turn right by default.
Having only O54 switches, means you have to fudge a piece of flex track when building to transition from O45 to the O54 divergence of the switch. The software will do it and connect, but building it will be interesting. Not difficult, but just the last piece to fit to close that section.
Back to the track - once you create one O45 curve, you can select, copy, paste and move like it is a sectional piece.
Anyway, I just messed around with O45 on bottom, O36 on 2nd level and fudged the third level. I am not sure how you would scenic this. Lots of flex shaped to those diameters, used for straights and in between diameters on the third level.
