I sent you another email Ken. I agree, you should check to see that your cams are timed right before setting your nocking point. You can also make fine adjustments to your nocking point using your tiller. Like an 1/8 or a 1/4 of a turn or so. Don't take or add a whole turn however in order to fix an improper nock setting, that's a bit extreme in my opinion. For very small adjustment it is easier than messing with your nock on the string. But then again most prong style luanchers are adjustable as well. I would do that before messing with my tiller.

Paul