Having watched Lynn's 'Alignment Golf' dvd, I can tell you that the arch Lynn is demonstrating is a little extra insurance against the flipping of the left wrist.
I'm sure some of the brains trust can enlighten you further, some time ago Lynn told us that he would view threads but he hasn't time to answer all questions.
__________________ The student senses his teacher’s steadfast belief and quiet resolve: “This is doable. It is doable by you. The pathway is there. All you need is determination and time.” And together, they make it happen.
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