[Daryl]

The line in 6-b-3-0-1;
" AT RIGHT ANGLES TO THE LEFT ARM PLANE."
Seems. applicable to angled hinging-BUT- not horizontal or vertical(the dual hinges)
if, what is meant by LEFT ARM PLANE is the plane of entire primary lever assembly.

Comment: #3 remains on the plane and traces the line.
Response: Always On-Plane. They Trace different Lines. With Throw-Out, The #3 PP Traces the Arc of Approach (or Plane Line because the Pulley is On-Plane) the Clubhead also Traces the Plane Line. With Drive-Out, the #3 PP Traces the Angle of Approach (the Angle of Approach is On-Plane but the Pulley is Vertical to the Ground) while the Clubhead "Covers" the Plane Line.

Comment: The left arm wedge is perpendicular to the plane continuously for angled hinge only.
Response: Only At Impact. The Shaft is ALWAYS On-Plane for Every Stroke. During Angled Hinging, the Clubface is Vertical to the Ground Throughout the Stroke.

Comment: And #3 roll on the shaft because the clubface and clubshaft are independant for horizontal and vertical hinging ??
Response: The Clubface and Clubhead are always independent for Dual Hinges. One Hinge Pin for the Clubface and the other for the Clubhead (or) one for the Left Arm Wedge and one for the Right Forearm Wedge (or) if you need simplification (like Bucket, O.B and Mike O) then simply "Left Wrist" and "Right Hand" - "Clubface + Clubhead".

hb

During Impact, for All Hinge Actions, The Plane of the Left Arm Wedge is Perpendicular to the Swing Plane and the Right Forearm Wedge is On-Plane. The Planes are at Right Angles to each other. + The Left Arm Wedge is Perpendicular to the Base Line of the Inclined Plane at Impact, 90 degrees.

This goes to some fundamental alignments. Some think about trying to create the 10-2-B grip however this is not the right approach. HK said that other grips "destroy the Wedges" but the reality is that the Wedges are never aligned when you take just any Grip. The better approach is to create the Wedges and align them at 90 degrees, and then Grip the Club. Impact Fix is your Only opportunity to Align The Wedges. So, all Strokes must begin with these Alignments at Impact Fix.

If you're on the first Tee and a guy is aligning His Right Forearm Wedge and Grip at Impact Fix and then he applies his Left Hand; don't bet him money ( unless his name is 12 Pc Bucket, then bet the limit).