Anyways, with regard to the left hand grip, it is specific to each individual.
Let your left arm hang at your side (which is low point) and keeping your body and left arm completely still, place the club in your left hand with the heel pad (Thenar muscle) on top of the grip and the clubface perpendicular to the target line, and you will have YOUR perfect left hand grip.
You should always align your clubface at low point, BTW, which will result in the clubface being slightly open at address. (Although, of course, less and less so the ball moves forward.)
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