There is a massive difference between manufacturers
I understand that fully. What effect with these changes have on ones golf score or shot quality though ? Numbers on a screen are just numbers on a screen. Where is the correlation between changing any of these parameters, and golf performance.Please give it up, this is just nonsense. The more a ball spins the more it will rise or go sideways depending on that spin, I don;t know how to make this simple enough for you to understand
The implied proposition of club fitting is that it will change golf performance. Saying this or that lie angle, loft, weight position will change launch angle or back spin does not make the case for that fundamental proposition.
As I said, I am open to such a justification of someone can make it.
Average 15 HI. Plucks 10 drivers off the shelf, regular, stiff, high launch, low spin, draw bias, turbulators, batwing, jailbreak, flat lie, the lot.
What would be the variation in his HI if he played a hypothetical season with all of those drivers ? ie. No fitting, just totally randomised specs (nothing crazy : no hickory shaft, frying pan stuck to a 1/2" pipe, etc".)