...which means you are correct. There are two ways to affect the spin of a shot: 1) Vary the ball position like you've mentioned. This varies your angle into the ball, increasing/decreasing the amount of spin. 2) Vary your swing speed. Speed means spin. Given two identical attack angles, the one with the higher swing speed will spin more. Swinging easy will typically generate similar distances, only resulting in lower shots that tend to release a bit.
4/9/10 at 6:06pm