Brian...
You said in this vid you like flat-as-a-board Flat.....i.e. "Jack, Tiger"....as you said.
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Do you really think a "matching" grip and/or a FLAT (as a board) left wrist at the Top is that superior?
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I mean...
Cause I know there's guys with stronger grips who STILL have FLAT (as board) left wrists at the top....Trevino, Duval, Beem come to mind....
But then there IS the "cocking in the Plane of the left forearm Flying Wedge" type wrist position at the top.....(and really, I hate to call that "Flat" whether it's TGM correct or not....cause it isn't flat.....we all know what flat means in normal English language)...which has an appearance of a cup.
I think it's at least important to know the differences, no? And that IS a way to do it, no? (or IYO, is a FLAT LW and matching grip that much superior for everyone?)....
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After much experimentation.....I now use a matching grip and FLAT left wrist at the Top....BTW.
-Paul