I think people put WAY too much time and energy attempting to make their broadheads hit the same spot as their fieldpoints. This seems like too much wasted effort IMO. If you are going to hunt with a bow, why in the world would you worry at all where the fieldpoints hit? Tune the bow to the broadheads and be done with it! Practice with last years heads or with practice blades. In doing this myself, I'll fling a few arrows with fieldpoints along with broadhead tipped arrows and they've never been more than a little bit off from each other.