[Daryl]

6-B-3-0
"Accumulator #3 is Rhythm control" and later he writes "Do both (horizontal and angled hinging) alternately until you see the distinct difference in the Rhythm and clubhead travel of all three of the roll procedures".

HK is referring to the Right Forearm Rolling about an Axis Perpendicular to the Horizontal, Vertical or Angled Plane. Those are the available "roll procedures". That ensures that while the Clubface is closing per the Pivot or Orbiting Arms, the Clubface becomes aligned to one of the associated planes.

The Term "roll procedure" is unique from the Clubface Turn and Roll brought about by the Pivot or Orbiting Arms, or Clubshaft Rotation using Swivel.

The amount of accumulator #3 motion - influences the clubhead travel - the distinct and different clubhead travel as felt/perceived by the player for each of the three hinge actions is Rhythm.

A greater #3 Accumulator Angle produces more Clubhead travel for all Three Roll Procedures. A rising tide raises all boats.

Clubhead travel, Rhythm - relate to RPM - rotations per minute - the number of angular degrees in which a "thing" travels in relation to a 360 degree circle. Take a short shot where the player hits three shots - all with the same RPM of the hands - each one the player uses a different hinge action - that's one example of different clubhead travel, different rythm, different RPM's for the clubshaft and the same RPM for the hands.

You're confusing "Swivel" and "Hinge". From the Swivel perspective, the Clubhead is experiencing travel distances because you're changing the amount of Swivel Rotation per inches of Hand travel. Swivel doesn't Align the Clubface to any associated Plane. The Clubface is Aligned to the Rotation of the Shaft.

Swivel is very different than Hinging.

Look at my dowel rod setups in post #74. Attach a Club alongside of the short dowel and as you rotate about the Axis, notice that the Clubface becomes associated with the same axis as the perpendicular pole. Then, you'll appreciate RPM per TGM.