Welcome to nose bleed railroading, Bob. Nicely done! I managed to squeeze in 2 parallel loops with all 072 curves on my Plate Rail Line. Although I complicated the track plan with crossovers and sidings, I plan to rework and simplify it. Switching operations at higher elevations gets tiring because you're constantly standing on a ladder. I will salvage my switches for the next layout since I prefer just watching them run from down below.
Still, the handiest item to have for this type of layout IMHO is a painters step ladder. Up on step 2 puts me at eye level.
Bruce