I’ll try another 1cent worth:

I do not work for GKF and the first thing I did when I got the T.K.O. was call and complains, as usual. That’s when they told me they were going to ship new pins. The T.K.O. is about $50. I believe speed is best when the arrow is near the center of the free string & not high in the window, so I set the Launcher Block level with the window
& made pins that bend at the rear of the window letting the pins lay flat in the bottom of the window.

If one does this, make sure the pins contacts the arrow at the same elevation and the pins are set at the same angle?

Now GKF says bring the arrow up the last 1 or 2” which they say will drop it on the power stroke from 8 to 12”. I say for whatever it’s worth 1”, dropping-away in 8”, this will be before the acceleration pressure on the string stops, thus before the bow is loose against the bow arm, ridding the arrow of the multitude of sins transferred by the bow hand.(bad form, nervous, failing to keep the sight on target until the arrow impacts, torque, & you name it)

The bows I tuned with these rests was the 04 Patriot SC (which I complained a lot about the speed), the Mathews 3D SC & the Darton Lighting Duel. I changed the Serving on the 04 Pat so the D-Loop would turn up and down the string effortless.

I started with the string centered, and the nocking point up about ¼” . The 2 SCs tuned in a few shots to put bullet holes in paper at any distance, The Darton took a little longer.

When I got angry is when the Old Darton bought under the old AMO standards almost shot at the same speed as the Pat that I had just paid $700 for. & I am yet complaining.