Bob H in NH is right on. I have a Bitz also and if the top of the jig is adjusted too far to the right, the vane won't sit properly on the arrow. I set my vane about a quarter of an inch from the bottom end of the ruling on the clamp. I also leave the vane out a sixteenth to an eighth of an inch from the clamp. Pay close attention to where you place the vane in the clamp each time so you don't end up with one vane ahead of or behind the others on the arrow.