[Theodan]

Not to get off topic, in fact this may be where to start the primer..

Why other that at Impact Fix and Impact do I care or would want to observe my clubface? Why do I want to monitor something that is 70 to 90 inches away from me, moving at upward 100 mph plus?

The Hands and On Plane alignment seems to provide the information that is more TGM'y than looking at the clubface.

What is it that the clubface provides that the hands don't?

For a beginner, whether the ball is going to straight or not. I work inside with a mirror in slow motion. "Fanning?", which plane?, plane shift?, back up and in?, top?, arc oriented to plane? Hands and feel lie, the mirror doesn't.