I'm still working on track layouts, and some of them use rather sweeping curves, like in the 48" radius range. At what radius does superelevation look "right"? I assume at smaller radii, the CG shifts too far towards the center and could cause problems. Would super-elevation still look proportional on say a 30" to 36"R curve? Also if two tracks are parallel to one another, would both inner rails be at the same elevation, or would the smaller radius line be at a lower height?