I've found that shooting a compound instinctive is difficult. At least for me. I have been shooting bows since about 1958 or so long before compounds ever came out. I need to have that arrow resting just above my index finger (off the shelf). I don't shoot my trads as often as I should but I am still a pretty good shot shooting about 3" groups at 20 yds and about 6 - 8" at 30 which is far beyond what I would shoot a deer at. But lately I have been shooting 3 fingers under and my consistancy has greatly improved. I can get better arrow alignment with the target when the nock is just below my eye and I am looking down the arrow. Back the old days we didn't have the nocks we have today that snap onto the string. You had to have 2 fingers under and one over to hold the arrow in place.