i'm guessing this is a vertical nock travel issue, which bowtech is famous for. really there is nothing you can do except back out one of your limb bolts a half turn or so. if the bottom one makes it worse put it back and do it to the top one. you'll lose a few pounds, but you'll get tuned. if you're already backed out on both of them you can try turning one of them in a half. good luck. me, i just live with a nock high tear. it doesn't bother me at all.