Just a quickie. How would a really good horizontal hinge action effect the shoulders after this paralell to the plane moment?
No problem
Hinge action is something completely seperate.
Ask the same questions. Does hinge action stop the left arm becoming inline at followthrough... it doesn't. Does hinge action stop the pivot center from being above the plane... it doesn't. Does hinge action stop extensor action pulling the shoulder flexability towards the plane line...it doesn't...
So regardless what Hinge action you employ it makes no difference to the fact that the left shoulder is onplane at followthrough and not the right shoulder.