"But it is always a Left Arm Stroke unless the Right Elbow replaces the Left Shoulder as the center of the Clubhead Arc. (10-3-K)"
Are left arm strokes swinging and right arm strokes hitting? Since the low point will be directly below the center of the arc wouldn't a right arm stroke require the ball futher back since the right elbow is further back than the left shoulder?
As you have quoted, all Strokes are classified as Left Arm Strokes unless theRight Elbow replaces the Left Shoulder as the Center of the Clubhead Arc(1-F).This would be the case, for example, with The Bat Minor Basic Stroke(10-3-K).
The Left Arm itself can only Swing -- it cannot Drive. However, the LeftArm can be driven -- Powered -- by the Right Arm. A Left ArmStroke that is Powered by the Pull of Centrifugal Force -- usually theresult of the Right Shoulder Turn Thrust (6-B-4-A) per 2-M-4 -- is Swinging.The Left Arm Stroke that is Powered by the Pushing of Muscular Thrust --by the Driving Right Arm (6-B-1-A) -- is Hitting.
So, the Left Arm can only Pull (Swing). The Right Arm, however, can either Push(Hit) or Pull (Swing). While the Right Arm Hit is by far the morecommon, the Right Arm Swing is The Bat used with loosened Wrists per7-19.
Regarding Ball Placement, for any given Line of Compression (2-C-0), allStrokes -- Left Arm or Right Arm and Swinging or Hitting -- have the sameImpact Geometry (Preface), i.e., identical Impact Alignments per 2-J-1.Ball Location will agree with that Geometry and the amount of Hook-Face builtinto the Club.