I've been shooting 3 under for my 15 +/- years of trad, a carry over from compound days. I tried split fingers at one point some years ago and just couldn't get comfortable. I have acquired most of my bows 2nd hand and have never had a problem tuning any of them to shoot 3 under. It still requires a matched arrow and a good anchor. I prefer a low shelf, just above my grip and a high anchor, middle finger in the corner of my mouth so that I'm looking right down the arrow. Other than that,as always, develop consistant form and let fly.