[EdZ]

Im not sure if I quite agree with you Edz, this is something which only recently i've really gotten into my head even though intellectually I knew it before.

The right arms role is to merely stretch out pp3 with extensor action(the stretch), right forearm pickup(the movement), and 'lock in' the plane by tracing its baseline (the point of that stretch) unless your hitting in which case the right arm also powers the downstroke(the movement). Remember hitting or swinging it is always a left arm stroke. The right arm allows control of certain alignments - as the right forearm traces back the plane line it controls the secondary hinge (the one that lifts the arm up and down) per the magic of the right forearm... it maintains its own impact alignment (right flying wedge) by pushing pp3 going towards the line. However the hinge action of the left arm and its swivel is entirely a job for the left arm alone to monitor, it is not the right arms job to get involved with trying to monitoring it.

Note I mentioned right arm motion, not right arm action, an important difference.