I like to have at least an inch of clearance past the rest, and often cut to the front of the riser ( just for safetys sake-especially with broadheads)- some guys cut the arrow right up to the launcher.

you *may* want to step up to a 75/95 (.340 spine) Some of the BT staffers can offer direct experience with their binary cams and can say for sure, but they do really seem to load up the energy and they are super efficient. On my new Elite, the 400 spine ICS I'm shooting (27.5" of actual shaft) seem right on the edge at 28.5" draw, 62 pounds. Another 5 pounds draw weight and I would be stepping up the spine for sure- As it is I may just do that anyways when I settle on arrows for this bow. I wish CX still made the 300 series (around .380 spine) as I believe that would be about perfect.At 70 pounds I'd def be shooting a .340 spine (ACC 3-60, GT 75/95, ICS 340, etc)