I switched from shooting 2fingers under, 1 above to 3under today. Seems there was some arrow flight difference. Should my string nock be moved up or down to accommidate this shooting style?

Thanks,
Wayne

You might need to move your nock point down a bit. Split finger shooting puts more even load on both limbs than 2 or 3-under, so the nock point doesn't need to be quite so high.