My guess is you got wobble in the Slicks. To get it out, loosen the head and spin the little washer some, then retighten real tight, recheck. Sometimes it takes 3-4 attempts to get them right. I use a set up w/ a dial indicator to do mine, but watched Smokepole get 2 set up by eye that were absolutely perfect when checked w/ indicator. I'm using same arrow as 10 pt Elites, or whatever they call their Gold Tip carbons.