I wish I could help you, but I sold mine after trying to make it work on my Vortec. I could never get it right either. I also had the arrow resting on the vanes while at full draw, which I did not like.
The main problem I had, was the dang cable slide on the ZE ate through 4 strands of my buss cable in ONLY 5 shots. I have had much better luck with other drop away rests. It's good to be shooting again.