Here'sthe out of tune theory: Guys have perfectly tuned bows to begin with when they are shooting FP's. They then screw on a BH and find that the poi is now 4 inches low. At this point they begin de-tuning their bows ever so slightly so that the poi of the BH and the FP meet at the halfway mark.
I've been saying that for years. Funny. People seem to find thingsso much more believeable when someone other than me says them.