RE: Nock fit
Also a much less expensive and very effective fix is to boil some water and then dunk your nocks in it to get them heated up and then nock them on your string. If they' re too tight, the soft, pliable plastic will open up just right. If they' re too loose, you have the opportunity to pinch them between your fingers and then pull them off the string, again providing a great nock-fit. Might not be the high-tech approach but it works like a charm.