[MizunoJoe]

The most powerful swings are ground-up motions in which the hip rotation initiates and aids the shoulder uncoiling. You can uncoil over a passive lower body, but it's not as powerful - the Faldo makeover by Leadbetter is a good example.

And, how does the Right Arm contribute to Left Arm speed in a Swinging Procedure using Accumulators 4, 2, and 3?