[Dariusz J.]

Thanks for your post- you described the concept of square well enough for me to grasp it. Obviously, I'm assuming that when we say "clubface square to the arc" we mean the leading edge (as clubface loft would create a whole different set of problems). Also, if as you describe- that before, during and after Hogan's impact his leading edge was square to the arc- then we are merely saying that he had (in TGM terms) angled hinging- correct? (Since during impact I imagine angled hinging as having the leading edge staying square to the arc.)
Horizontal hinging and vertical hinging would only have one point where the leading edge is square to the arc through the impact period. So given your post you're implying that angled hinging has a superior accuracy and repeatability- which doesn't make sense to me. Food for thought!

Mike, thanks for your post.

I can only say one crucial thing for your consideration - as you TGMers call it - angle hinging (that means keeping the clubface square to the arc) brings more repeatability and consistency because it may eliminate (or better said, may limit) the timing issues and subdue the clubhead motion to the pivot much better.
Imagine this - your body is "equipped" with four distal parts - your legs and your arms. Let's concentrate on arms now - if the arm/forearm/wrist/hand action during the short period of impact zone is independent on the body pivot it must bring timing issues into play much more. Therefore, any of players using Henry Cotton's crossover release or your TGM horizontal hinging (i.e. when the toe passes rapidly the heel at impact) must recon on a good timing much more than a golfer with a square-to-the-arc clubface in the impact zone.

Cheers