[Yoda]

The subject here under discussion [Finish Swivel] is one of the reasons TGM sank into obscurity in the eighties while others became very, very wealthy selling a less extreme Swivel, after a less Horizontal Hinge.

Please don't head down that road again!.

Thank you, Yippedagain, for your post. I've quoted Bobby Jones above -- "There is no virtue that cannot be exaggerated into a fault" -- and, as you have implied, the virtue of the Finish Swivel has no doubt been exaggerated by both Teacher and Student.

The Teacher who encourages a Clubface to the Ground at waist-high (or earlier) is encouraging an Over Roll and Throwaway. Likewise, the Non-Swiveling Student who takes the whole bottle of medicine -- not just one pill -- and combines it with a Turned Left Hand Grip (10-2-D) proves to the world that it just "doesn't work."

In the face of these misguided efforts, The Golfing Machine stands in its precision.

The Horizontal Hinge Action of the Flat Left Wrist is just that: Through Impact and Follow-Through, the Flat Left Wrist remains Vertical (Perpendicular) to the Horizontal Plane (the ground). As the bridge to the Finish, Swivel Action Rolls that Horizontal Hinge Action -- AFTER the Follow-Through -- into its correct Parallel to the Angled Plane alignment. This is a far more dramatic motion than most golfers appreciate.

Then, as the player emerges from Follow-Through, he often begins to 'stand up' into his Finish, i.e., the Right Shoulder comes off the Plane. I know I do -- my back and lack of flexibility demand it -- and when that happens, the On Plane Wrists now appear to Roll further toward the Horizontal. Actually, the Wrists are merely maintaining their original On Plane alignments. Only the On Plane Shoulder alignment has changed. And that by just a 'smidgeon.'

Again, at no time do the Head and upper torso 'hang back' while the Hands Swivel independently through Impact. That way lies sorrow. Nor do they Swivel as a high Right Forearm directs the Clubhead across the Plane Line from the Outside-In.

Read The Book and my posts. Define the geometry of the Hinge Action and the Swivel Action and their respective relationships with the Plane Line.

And don't be frightened by that Rolling, Vertical-To-the-Ground Clubface through Impact or its subsequent Swiveled, On Plane condition. Know that its relationship through the Ball is with its Associated Plane (Horizontal, Angled or Vertical / Hinge Action) and only after the Follow-Through (Both Arms Straight) with the Plane Angle (Swivel Action).

Except as integral to the Impact Alignments established at Impact Fix (2-J-1), the Target Line is incidental.