For the Left Wrist to Cock and for the Club to remain On Plane, the palm of the Left Hand must On Plane.
That reiterates my original problem! My understanding of the left arm wedge was this: Take a dowel, lie your whole left arm on a table with the palm facing down, hold the dowel in your left hand. By cocking and uncocking the left wrist you can move the dowel without it leaving the table - it's on plane, but if you bend the wrist then the dowel lifts off the table - off plane - broken flying wedge. But because the left arm is not on plane in the golf swing, but the left palm is, mustn't the wedge be broken??? In an actual swing isn't it akin to having the palm on the table, but the left arm at an angle to the table, and then isn't the left wrist bent slightly?
Makes me think of the Hogan five lessons pics illustrating pronation and supination, with a cup in the wrist on the way down, presumably prior to rolling at which point the left wrist flattens.
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