Too late, sorry, but here's a tip for finessing the bevel:
Cut the piece a hair long. Snugly, but not tightly, clamp up with a strip of sandpaper on each side between the bevel and the leg, and a little longer than the crest rail is wide. Holding the rail with one hand, gently pull the sandpaper out. Repeat if needed. I've found this to dial in a very nice fit.