[Jeff]

Mike - you make a relevant point about "feeling" slow and deliberate ia an important "feeling" in a swinger who suffers from over-acceleration and clubhead throwaway.

However, I am interested in a specific answer to my question's primary implications. One needs lag at impact to hit the ball solidly. The Iron Byron machine is adjusted (in terms of central arm speed and club release point) so that the clubhead is just behind the peripheral hinge joint at impact (like the one arm golfer). That ensures that the clubshaft has forward shaft lean at impact. For a given clubhead speed at impact and given degree of forward shaft lean at impact, does the quality of lag affect ball flight distance? In other words, does a swinger have the ability to modulate the quality of lag at impact and produce a "heavy hit" (? increased smash factor) that can increase the amount of energy imparted to the ball, and therefore ball flight distance, for a given clubhead speed and given amounf of forward shaft lean at impact?

Jeff.