"So, Right Elbow Action either powers and/or controls all three elements or Three Dimensions Impact (2-C-0) per 1-L-9. All this you will come to know as THE MAGIC OF THE RIGHT FOREARM."
HK is stating that the right arm does it all - is this true for the swinger?
The confusion begins with the discussion of the left arm, accum. #4, pulling with the left side, uncocking the left wrist, etc.