Is there and optimum setting
GKF says their rest, when brought up the last 1 or 2” will drop 8 to 12” into the power stroke.
The best may be the last one inch, that would let it drop 8” into the power stroke while acceleration pressure is still on the bow string. While the acceleration pressure is still on the string the bow will be pressing tight on the bow hand. The pressure on the string may go from the let-off pressure of about 15 lbs, to possible ± 70 lbs. before it starts to decelerate.