[Daryl]

What's wrong with Tommy's way to illustrate this? Doesn't the club face and the left wrist always point in the same direction - in these 3 types of hinging?

Holding the Flat Left Wrist Vertical to one of Three Associated Planes (Horizontal, Angled, Vertical), imparts the same Alignment to the Clubface.

2-G HINGE MOTION ......
These motions actually duplicate the three possible hinge mountings – horizontal, vertical and angled – representing all three Basic Planes (7-5). The Hands can be educated to reproduce them by holding at least one Hand vertical or parallel to the corresponding Basic Plane. These motions also duplicate the motions of paddles of a paddlewheel rotating around its axis vertical to one of the three Basic Plane

If TT's Clubface had "Zero Loft" while demonstrating the Clubface-Stick example, it would be more valid for explaining the effects of Hinge Action. ??