Can't tune it! Sometimes a bullet hole most of the time tears left and low. I have it set to rise at the last 1 inch of draw. Maybe I'm getting contact with the rest. My nock is set just a tad high almost level. Do I need the arrow to stay on the rest longer? I'm about to go back to the trusty biscuit. I've tried vanes and feathers. I'm shooting 70lbs w/28inch Beman ICS 340's. Should be plenty stiff. Is there away to adjust the speed of the drop with the spring in the rest?