[Daryl]

The 'gap' in the thumb is effectively the difference between the left arm flying wedge and 'the plane'.

The left thumb is 'on plane' for the most part (PP#1). While the left arm/flying wedge is basically 'a bit above' plane'.

Think of 'hugging the plane' - it stays between your arms.

But Ed, the left arm wedge forms a flat plane that runs the length of the left arm and clubshaft. How can you cock on the plane of the left arm flying wedge and the inclined plane at the same time?

Which plane was HK referring to (inclined or left arm wedge) when he wrote that for the swinger, the #3 pressure point is directly opposed to the On Plane loading Action of the Secondary Lever Assembly?

No trick question here. I went out to try Mathews procedures he posted in the "Spheres" thread and found that cocking the left wrist on the plane of the Left Arm Flying Wedge was a superior procedure to cocking the left wrist on the inclined plane. He confirmed and agreed. So did HK mean the left arm plane or inclined plane?