String hand grip: I shoot split fingers, and found that my greatest improvement came when I began taking a deep hook. Taking a deep hook, where the string is positioned within the crease of the first finger joints and my fingertips are folded back, enabled me to focus on relaxing my wrist and forearm, particularly when shooting the higher poundage hunting bows. I'm pretty sure I have more or less equal finger pressure on each finger, but it's not something I focus on.
Allignment: I think the key is repeatability. In the latest issue of TBM, Fred Asbell discusses the stance. He is almost in agreement with Terry Green, in that he advocates an open stance that allows you to pivot in order to take a range of shots without moving your feet, while keeping your shoulders in the same allignment with the bow and arrow. I say "almost" because while Terry advocates having the shoulders parallel to the arrow, Fred advocates having the shoulders a little open with respect to the arrow.
It may be a matter of physique. If you look at the pictures in TBM, you will notice that Fred has grown some over the years, as have some of the rest of us. For some of us, it may be difficult to get into a shooting position where our shoulders are parallel with the arrow, no matter what position our feet are in. But for Fred, and I think for me, moving the shoulders as far into a square position as our body allows will put them in the same position for each shot. Fred also mentioned, and I agree, that having a slightly open shoulder position makes it easier to bring the back muscles into play than a completely square shoulder position does. And having my back muscles engaged is one of the most critical aspects of good form.
After reading Fred's article, I stopped fighting to get my shoulders completely square, which was causing me to be unnecessarily stressed, and now just move my shoulders around into a nearly square position. It's a definite, repeatable place where I know that if I try to move into anymore of a square position, I will begin to be stressed. It allows me to be a little more relaxed, and I think my shooting will improve because of it, but's it's still a little too early to tell.