Interesting. My biggest question with the Autoflex is how it performs during a normal round of golf.
Say you hit the Autoflex of the tee and then a X100 into the green. Then a 3 wood with a conventional 70g X-Flex and a wedge on the next hole. Now on the next hole you hit the Autoflex again etc.
I feel that in this scenario the Autoflex could mess with your rhythm on the other shots where you have wildly different shafts both in weight and stiffness.