As far as I am concerned this has nothing to do with hands-controlled-pivot
or ass-controlled-hands or any other phrase.
I also don't believe that "What you are doing is as good a
"key" as any for this method. " is a good answer, it is maybe
a good non-answer though. I was looking for some assistance in my
understanding of the need for depth at the top of the backswing to aid in my
understanding of my own swing, but I guess I'm looking in the wrong place....