Yoda had explained to me that once the right wrist is bent (if you don't start off from Impact Fix) it is FROZEN, I believe those were his exact words.
Once bent, it remains the same amount till after Impact.
You can't have a bent right wrist and bent left wrist.
Maybe that is why for most of my golfing life, not knowing it, I always had a forward press, almost Impact Fix till I learned about Impact Fix.
Once bent, the right wrist, freeze it till Impact.
Full lever extension; in the words of the sage "Green Guy", "OBLITERATE" the plane line! The left wrist goes from level at impact into a fully uncocked attitude. Also, RHYTHM is most important. Mr. Kelley so significant that he contemplated giving it imperative status. Remember, each hinge action has its own unique rhythm and travel distance.
EC
EC demonstrated this to me yesterday. If you do not go to Full Extension (Level to Uncocked), he showed me how you will end up off-plane. I do not have a problem with Flat but with full extension - Level to Uncocked. If you don't fully uncock, you don't get the full Downard dimension, you lose your paddlewheel and your swing is off-plane.
EC prescription - hit little shots from Fix finishing at follow-through both arms straight left wrist fully uncocked and club pointing at the plane line. Check your alignments holding the Follow-through. Did you get to full extension (uncocked)? Did you keep your left Flat right Bent? Are you pointing the club at the plane line?
The sound is TOTALLY different. No uncock = click. Full Extension = OBLITERATION = a very loud THUMP.
The feeling of impact is much different. The ball will feel MASHED like it was just FLATTENED by your 3 dimensional downstroke.
Drawing upon my very limited knowledge of TGM, I suggest the following: (consider all as questions!)
1. No mater how you place your right (bottom) hand on the handle, you will have a #3 PP. May not be the preferred place but will have one.
2. Concentrating on PP #1, getting extension on the backstroke and using a right forearm take-a -way will help you stay on plane.
3. Concentrating on PP #1 through impact will help you achieve a flat left wrist at and beyond impact. Also a bent right wrist.
Too much concentration on PP #3 can/will cause throwaway.
Of course all goes out the window if the right wrist cocks!
W/O knowing what I was doing, in the past, I often practiced with the right thumb and forefinger removed from the handle. Stopped throwaway for me. Also played that way on numerous occasions-if only I could have taken less than 34 putts!
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