I had an QAD ultra rest on my BT Mighty Mite that was shooting around 300 with my set up and I got severe fletching contact. I put a heaiver spring in the rest and still had a little contact but alot of noise. I now have Drop Zones on both of my BT, one is a Pro 40 Dually that shoot about 318 and I don't have any contact with it. But I know several people who have the QAD on their set up and it works fine...just not for me. I also shoot with some guys that love the Zero Effect and the NAP.