No this is relevant, you became a "hobby" fitter from spending hours on Wishon's forum? Also, you don't necessarily needs a trackman as i didn't have access to one (still don't) but did use what was available back in the day at various fittings events with other professionals and i helped fit a lot of people using Vector & Zelocity, which before trackman became available, was generally the norm. I used real people with real equipment and machines spitting back data to me.
Not denying this, of course it will. But changing his equipment could significantly reduce his swing speed and resulting ball speed a lot more than he wants. Of course can go to heavier/stiffer shafts BUT that also radically changes the "feel" and launch conditions of that driver.
That is an option and requires time/money to go do that. All i'm saying is that a cheap/easy/simple way to give up a little distance is to shorten your driver; that's it.
Dear Jim,
I have very high regard for the quality of your posts, and want to provide what I believe, and have tested to be another reason a shorter club may produce a higher swing velocity AND more centered hits as noted by BALL velocity and of course, the 'Smash factor'.
Simply, as you probably guessed, IMO the answer is BETTER LOWER BODY DYNAMIC BALANCE AND STABILITY. This automatically happens as the body adjusts to the shorter length AND IMO, the closer the golfer stands to the ball. Even parts of an inch are sufficient, combining with the slightly reduced 'height' of the golfer to the ball with the shorter club. So being closer to the ball, with a lower stance, and the pelvis center of gravity further from the 'instantaneous center of pelvic-axis rotation, more dynamic stability is produced.
The next advantage after just a few swings, and the body FEELS this new balance, is that the antagonistic muscles that used to protect the longer shaft AND THE ASSOCIATED DYNAMIC INSTABILITIES WITHOUT THE BUMPY BACK, sometimes relax, and the golfer produces more useful torques for the distance producing elements, ie. torso, shoulder complexes and of course, the lead arm..
SO PLEASE JIM, GIVE 'BUMPY BACK, KEEP IT BACK' A TEST RUN ON TRACKMAN, and also talk to Brian, Jon Hardesty, Billy McKinney and Chris Como, who did give 'Bumpy' a fair test and realized up to 10% improvements in distance AND 40-50% reductions in one sigma dispersions.
All of us DEARLY NEED PEOPLE OF YOUR STATUS WITH THE GAME to develop an opinion regarding at least lower body dynamic stability, and the incredible POTENTIAL advantages of increasing it during the set-up and transition, if required based on the swing style.
Respectfully,
art
Finally, most of the 'Bumpy back' significant experiences can be found easily by a 'Google' search on "Bumpy Back vs Diagonal Stance"