Slowinski is an interesting read. Very tech oriented. On the subject of cupping the ball, he contradicts himself. In the foul line drill, he says cup the wrist (try to cup it when your hand gets to that positiion in the swing, not before. In another article about finger position for more revs, he says cupping is bad and can hurt the wrist. He is a proponent of cocking un-cocking the wrist ala Fagan and Malott. Which is correct? The one you can learn how to do and repeat.