[phillygolf]

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People learn to do all kinds of things... drive a car, type, walk, dance, etc..

Any of these would probably be tricky to change, once the intitial pattern, or GROOVE, is formed.

Look, for example, at Billy Mayfair in putting, and Charles Barkley in the full swing. These are both athletic people.

Others, like Tiger, and probably someone like Mac O., seem to be able to make changes rather easily.

I'm not sure about the 20 day thing either, but it does seem to be about that for some things, and some people.

My point is, everyone is different. 35, 29, 220 might not work for me, but might for you.

And it took Tiger almost 2 years to get his hands outside the clubhead.