Find an article about bare shaft tuning for trad bows. It would be much easier to tune with a set of instructions in hand. As for you nock, it depends on tiller and finger placement. A good bare shaft article would address it as well. A safebet would be to set your knock a bit high for three fingers under, or on for split fingers. I say that because most bows are tillered for split fingers. I tiller all my bows for split finger, unless other wise requested.