Here is a video explaining the D-Plane. This is a very important video to watch because the D-Plane explains nearly everything that happens to cause the ball to slice or hook. It is based on the "New Ball Flight Laws". It also explains why higher lofted clubs are more difficult to draw or fade with. When you understand the D-Plane it becomes easier to determine what swing changes are needed to fix the ball flight.
http://www.youtube.com/watch?v=dP26-P7eYH8
Equipment, Setup, Finish, Balance, and Relax. All equal in importance and all dependent on each other. They are the cornerstones of a good golf swing.
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