Mathew wrote-: "If the left wristcock takes place without a bent or arched condition, it moves on a plane that is aligned with the left arm. Since the left arm is not onplane and it is above plane therefore the left wristcock plane CANNOT EVER be aligned to the inclined plane."
I cannot understand why Mathew believes this fact. He uses the phrase "cannot ever", which I think is incorrect. It is true that the left arm is above plane, but that doesn't mean that the left wrist cock cannot be on plane. In fact, I think that the left wrist has to be on plane if the butt end of the club is
always pointing at the ball-target line (when the lower end of the club is tracing the planar baseline). Let's presume that the butt end of the club and left hand moves from the elbow plane (at address) to the turned shoulder plane (at the end-backswing), then there is a time period during the backswing when the butt end of the club is pointing at the ball-target line (even while it is shifting planes from the elbow plane to the turned shoulder plane) and when it is pointing at the ball-target line (or its extension) then it is "on plane" (presuming that the baseline of the plane is the ball-target line). When the butt end of the club is 'on plane", then surely the left wrist cock must be "on plane" because the left wrist cock occurs on the
same plane as the back of the left wrist/hand.
For example, here is a photo of Tiger Woods and Adam Scott in mid-backswing.
Note that the butt end of their club is pointing at the ball-target line. Surely,
at this moment in time, their left wrist cock is also "on plane".
Jeff.