* If the left wrist is flat the club must cock directly towards the left shoulder and uncock away from the left shoulder.
* In an onplane swing, on the turned shoulder plane, after turning, the club cocks back towards the right shoulder, or where the right shoulder will be after it has turned back to plane. Or, in other words, the wrist cock occurs on plane.
* The only way the club could cock towards both the left and right shoulders would be if the left and right shoulder were both on plane (possible with a rotated shoulder plane?)
It seems to me (and I'm happy to be corrected on this!) that you need a small bend in your left wrist to cock towards the right shoulder unless the left shoulder is also on plane.
Threaded Mode
