Hilt,

I have had the pleasure of working through the shanks in my golfing life and, (no offense to anyone else), it is not caused by an extreme over the top move, or too much weight on your toes or mental issues etc.... The shank is caused by an open clubface at impact. You are probably rolling the face open on takeaway, like millions of golfers do, and not squaring it at impact. You are coming into impact with too open of a clubface which means you are leading with the hosel. If you don't get it square, guess what, shank.

Try taking the club away more square to the plane and not rolling your hands open. Box drill will not help you fix this permanently.

I have books by Mclean, ledbetter and harmon and none of them address the proper way to cure this problem. Trust me, fix the clubface.

JB

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Cleveland HiBore Tour
Mizuno MP-32 irons
Titleist Vokey SW/LW
Cameron Studio Stainless Newport 2