Clubhead speed at separation

[Jeff]

I interpret nmgolfer's post as indicating that golfer C would not generate a significantly greater ball velocity than golfer A, and that golfer C's clubhead will not slow significantly less than golfer A's clubhead as a result of ball collision.

What about golfer B compared to golfer A? What does HK mean when he envisages a swing radius extending from the feet to the clubhead, and what effect does this "mental construct" have on ball velocity and clubhead slowing as a result of ball collision?

Jeff.