pure vardon, pure armour, pure jacobs, pure tomasello, pure kelley
You've definitely misunderstood Kelley's flat left wrist because you used to think it should remain flat ad infinitum ad nauseum. Or as you Ben Doylites advocated, you believed the right wrist should remain bent back ad infinitum ad nauseum. Both wrists should unhinge to hit a golf ball well, but according to your own summit's scientist, Sasho?, the left wrist should unhinge (deviate) ulnarly prior to impact and only extend (dorsi flex) post impact as a passive inevitable response to what just took place. Kelley said the same thing. Sasho says 4, 2, 3 just like Kelley, because, like Kelley, Sasho didn't put #1 in to his swinging model. Vardon, Armour, Jacobs, Tomosello, me, Croker, and now, you, say 4,1,2,3 and #3 eventually causes your late flip as it inevitably and inexorably will and responsively and responsibly should.
But the real #2 is not a flip. The real #3 causes a post impact flip if a good #2 happens before impact. In other words #3 roll creates a timely flip if you let it; but I wouldn't try to cause a #3 roll/late flip because you'd need to try to cause it near the end of your backswing in order to have it happen .25 seconds later around impact. You really must be talented to bow your lead wrist and cause it to flatten and bend forward through the ball while your lead hip and lead shoulder cooperate by moving in and up for the whole thing to work it all out right. Sasho never says what causes the lead arm to separate from the torso after the torso's inital acceleration keeps it pinned to the chest. Perhaps a'la John Jacobs/ Homer Kelly it's the #1 trail arm throw that propels the lead arm off the chest and a'la Tommy Armour, it's the trail wrist that flattens or straightens as #2 to speed the plow so quickly that there still remains some #1 thereafter to keep the plow moving as it magically becomes #3. #1 is #3 after #2 is done. Brian you are now officially 4 barrel. Straighten the trail arm for your tangential acceleration and the trail wrist will also straighten in a timely manner to wallop the ball; you'll get your late flip I guarantee it.
Good luck with your pay for play. I will not. All that you promote was figured out anecdotally in the dirt long ago. Stop tring to cause what should be allowed. You'll still not master it, but you'll give the magic of the trail forearm and the trail wrist a'la Vardon, Armour and Tomasello, and not Kelley or Doyle, a fighting chance. Let both wrists unhinge before you strike the ball but you needn't cause them to.
