You wrote-: "It is not a question of where the elbow is at impact but rather the plane the club was swung down from the top into impact."
Who was talking about the position of the elbow at impact? I stated that most PGA tour golfers have their clubshaft on the elbow plane at impact. They get it there by having their clubshaft shift planes from the turned shoulder plane to the elbow plane during the downswing.
12-1-0 and 12-2-0 recommends a zero plane shift swing where the golfer remains on the turned shoulder plane. I cannot understand why having the clubshaft on the turned shoulder plane in the late downswing and at impact is deemed to be desirable.
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