I know this is an old thread but I just wanted you to know that this really helped me. I've never had to think about the startdown waggle (left hip bump), now I know why. My intent to hit the inside aft quadrant of the ball. YES!!!!!
Agreed. Most people aim at the back of ball even though it is back of low point, cover the target line and then curse their corresponding out to in path. Their over the top move has its roots in a misconception. The correct geometry of impact is not what one first thinks. Knowledge lends itself to an intent that has a slightly different visual equivalent associated with it.
Its all about tracing a straight plane line (with your lag pressure point), which visually will appear to be (and is) an inside out Delivery Path of the hands and Delivery Line of the clubhead. An inside to out clubhead blur but with a straight divot that points at the target. (That when closely inspected will ideally show a little arc pre and post low point).
With all of this as your intent and your mind in your hands pressure points........the pivot acts accordingly. Its the way we do things all the time. We dont think about our pivot when we throw a ball but we do pivot dont we........and just the right amount. More pressure, more pivot like the outfielder throwing to home plate.
If your not tracing, or watching the blur or covering the angle of approach or something similar, you're probably not on plane. Your divots will tell the story. Walk down the fairways and look at all the divots pointed way left...........Homer figured out why decades ago but it still isnt in the golf magazines. That darned inclined plane of motion makes the geometry so difficult to see and talk about.
You gotta train that pivot! Starting with your head centered...set...and still! Centered between your feet...set a impact height...and as still as it can be. I say this in connection with clearing the right hip because I believe swaying hurts your ability to clear the right hip...thereby making it impossible to tilt the axis...thereby making an on plane right shoulder thrust impossible...a head too high at address necessitates a "bob" on the downswing...an uncentered head (over say your right knee) to me is an invitation to sway on the downswing.