I'm using AutoCAD MEP 2014 x 64. I would love to add 1/8 bends and 45's to the pipe part routing preferences for cast iron no-hub, and PVC DWV. I can only manage to get 1/4 bends to associate with 90 degree turns. When I draw pipe at a 45, the window pops up telling me there are angle limitations and that I must select a part to use. Is there anyway to add 45 degree turns as a type definition in the pipe part routing preferences?