Watch this video closely and you can learn how the different hand positions create different ball rotations and give you the ability to play different parts of the lane. In this video all the lanes are oiled the same yet some are playing in deep and some are playing outside close to the gutter. Notice how the ones playing to the right side of the lane outside have their hand relaxed backward and the ones playing left and in deep inside are cupping their wrist and even some are grabbing and hitting up on the fingers in order to create the high rev needed to get the ball to hook enough to get back to the pocket from deep inside where the oil is heavier volume.