Lynn would I be correct in thinking that other than in Delivery the Arm Motion is always Independent, in the ideal? Take Startup for instance: There's some independent Arm Motion there too isnt there? The Right Shoulder turns Flat Back , the Right Forearm Picks Up. Two vectors that net out with the Hands riding the selected Plane Angle. Ah cant do that very easily with a hanky under the arms either.
Yes, O.B., the Arms constitute Zone #2 with its Club Control, Power and Force. Their assignments are independent but coordinate with Zones #1 (Body) and #3 (Hands).