so in a simultaneous release, not only are 2 and 3 released at the same time, they also 'run out' at the same time?
Yes, The wristcock and wristroll release is simultaneous - they 'run out' or release together....
I remember Yoda saying that Homer Kelley said that the plane of is the heart and soul of the golf stroke because everything must comply with it. Your hand may be turned towards the plane but it is not on the plane - it goes into the plane at an angle - the only way that the golfers flail uncocking alone is going to be on plane is if either the left arm is also flat against the plane which doesn't happen in a golf stroke. Instead that swivel joint has got to work in conjunction with the wrist uncocking.
Also - keep in mind that the 'roll' is imparted by the pivot, by Acc #4 'dragging' the left arm so as you uncock 'down', your pivot 'throws out' and rolls. If you do some start down waggles in which you exaggerate the uncock 'down', and hold your pivot until #2 is basically fully released, you'll see how the body (#4) 'drags' and brings everything 'around'.
This is a very useful way to feel the 'swinging gate' of the horizontal hinge action (using the pivot to feel the 'horizontal' nature of the 'around' motion - a lot like throwing a frisbee).
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