[Jeff]

Yoda - you wrote-: "Any undue Bend (Horizontal Motion) in the Right Wrist will produce a corresponding Arch in the Left."

I can understand that situation existing at impact - when the right forearm is "fixedly" on-plane any excessive right wrist bend will produce an arched left wrist.

However, what about the top of the backswing? If the left wrist remains flat throughout the entire backswing, then wouldn't small variations in the degree of right wrist bend at the top of the backswing simply cause small variations in angling of the right forearm (relative to the left arm flying wedge) and small variations in the position of the right elbow. Would that be consequential in terms of swing mechanics?

Jeff.