Moonman,
I might have missed it, but on your reverse loop, did you use a 2.5" C/S coming off the curve leg of the D-21 Turnout? It shows a 10" straight which could cause a problem taking this turn. Using the 2.5" C/S would also require a 2.5" straight and a 5" straight to replace the 10" straight shown coming off that curve.
Larry