The "false flip" A left wrist that is bent at address, impact and throughout the back swing, but where there is still lag pressure. As long as the shaft end of the club is pointing ahead of the swing center. Not the left shoulder, but the real swing center.
Also excellent points Sir. Geometrically flat rather than the appearance of flat? You guys are wonderful contributors to our journey!
Kevin
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I could be wrong. I have been before, and will be again.