What I found with my QAD is that there is clearance issues with Blazers. Even with the shorter launcher Blazers will contact the top crossbar with the cock vane pointed straight up. You can see this if you place an arrow on the rest backwards and hold the rest in the full upright position as if you were ready to fire. Align the arrow with the nocking point on the string and you can spin the arrow with the vanes under the crossbar. The contact with Blazers is minimal and arrow flight seemed fine. What made me suspicious was arrow speed. I was getting 245 fps with my old whisker biscuit before I switched to the QAD, in the meantime I bought a new bitzenberger and started fletching my own arrows. I borrowed a chrono from a friend and when I checked I thought it was strange that Blazer speed had dropped to less than 230 fps when I thought that it was supposed to increase with a drop away rest. Then I tried some other arrows, one had 3" quickspins and the other had 4 blazers and they both got 250 fps, that's when I discovered the clearance issue with Blazers shot with cock vane up. If the arrows was rotated just a little arrow speed went back up. I switched to the 3" quickspins and haven't had a problem since.