Well, moving the nock point higher is a form of tuning to the crawl, since it moves the hand closer to center of bow and creates less limb imbalance. You want to tune the bow for the actual nock, get that at an acceptable point on (say 30 yards, in case a big one walks out there), and then set your other nock for the crawl, probably something in the neighborhood of 1/2 to 5/8s down the string from the first nock point. If your first nock is pretty high, which it will be for a 30 yard point on, then the crawl doesn't detune the bow much, if at all, although it would still be better to be able to play with the bow's tiller to find what works best for you, probably zero or close to it.