[Yoda]

I'm guessing TrackMan doesn't have the capability of measuring it, so they don't acknowledge it's existence?

I don't think the people at TrackMan have taken a position one way or another on the validity of the Hinge Action concept. The challenge comes from other quarters.

All I wanted TrackMan to verify was what 'others' said could not be done. Namely, that I could change the Clubface alignment through Impact simply by using my Flat Left Wrist to execute selectively each of the three Hinge Action Feels, i.e., Roll, No Roll and Reverse Roll.

And it did.

Of course, I already knew I could control the Clubface with my Flat Left Wrist, but I went through the "scientific" exercise in order to "prove" that I could.

And I did.