I shoot 3 under & 1/2 my bows are tillered for split. My experience is exactly as Dick says, just raise the nocking point up til ya get good arrow flight.
To fine tune, bare shaft up close 1st, then move back as you make adjustments until you're happy, or at least satisfied with the arrow flight.
Broadhead tuning, I just shoot all my tipped hunting arrows thru several layers of cardboard & confirm that there's no problems with their flight. Such as fletch bounce etc. Usually I'll shoot each one 3 times. Cull any duds to fix later & sharper the rest moderately. Fine sharpen usually the night before a hunt etc.