I shot blazers but put the quick spins to the test this summer. I fletched up 6 arrows for all my bows (hoyt razor tech with a muzzy zero effect, Hoyt redline with quick tune 4000 drop away, and a hoyt excel with a quick tune 1000 fixed rest). I had trouble with quick spin 4 inch clearing my drop away rests. I had to move theknock up to 3/8s an inch andgreaterm which is way to high for my liking. Did ok with my fixed rests. I was very disapointed with the durability of quick spins. They did not hold up to the slightest abuse at all. They also slow your arrows down. At 30 yards you could tell they caused a much greater drop than other types of fletching. Im sticking with blazers. Oh one other thing, they are the loudest fletching I ever shot. I think they are much louder than feathers.