RE: length of arrow past the end of rest
capt:
Without an overdraw guard, which I do not use, I cut my shaft lengths to compensate for an " adrenaline draw." Once my broadhead is mounted, my " adrenaline" draw has my BH blades stopping just at the front edge of the riser of the particular bow the arrows are matched to.
I dial in my draw-weight to match the spine of my completed shaft.