RE: Three fingers under or split-finger method?
I started out shooting a bow when I wasn't much more than a toddler by pinching the arrow between my thumb and forefinger, floating anchor and eyeballing down the shaft. That was how my grampa taught me and, a few years later, it was how my Comanche friends shot their bows. Killed mucho small game and wild pigs that way. Imagine my chagrin when I took an archery class in college and found out I'd been shooting all wrong.
So, I had to learn to shoot like a white man. Split finger, index finger at the corner of the mouth, yadda yadda... Took me a whole year to finally get the hang of it.
Shot that way until the mid-80's when I began shooting my compound 3-under in NFAA cometitive bowhunter class and developed a gap system. Still shot my stickbows split though.
Last year, I found out my arthritic fingers didn't hurt nearly so much when I shot my stickbows 3-under. Now I've been floating back and forth between split and 3-under. I really haven't gotten comfortable with the shorter point-on distance I get with 3-under but, like I said, it's easier on my fingers. I need to just go ahead and make the switch and make it final.