Here's a fun fact: the finger motions of shooting and handling are very similar to playing the saxophone. Because I was a serious saxophone player for a while, I always had good hand strength and finger control. It definitely helped with my shooting touch. I think the difference between great shooters and good shooters is in the hands, basically how they balance the ball and its release trajectory. I see a lot of players just flop their wrist and fingers on the release like they're waving at someone. I think ideally the shot release should be more subtle than that and the fingers should point forward and out instead of down. At the least, this makes it easier to shoot off balance and from different stances.
Just thought I'd pass that along.