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Jeff, you said "The issue of the clubhead swivelling into impact is a separate issue. I actually think that it happens automatically. Have you watched an Iron Byron machine in action? It has a universal joint that is totally passive. The clubhead swivels automatically to allow the clubface to become square at impact. There is no device in that macahine that actively causes the clubface to become square at impact. "
For Iron Byron, I have tried to find more information through google without success. I would love to hear how the clubhead can do a 180 degree swivel unpowered (i.e. only by inertial forces). I can learn something here. Thanks in advance.
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