It's a combination of the roll and the angle. It works like a gear. Small hand motion + rotation gives long club head travel.
IF YOU DO NOT HAVE A MOSTLY FINGER GRIP UNDER THE HEEL OF YOUR LEFT HAND, ALA HOGAN, THE POWER ACCUMULATOR # 3 WILL NOT BE EFFECTIVE AND YOUR machINE WILL BE MUCH LESS EFFECTIVE. rock on!
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HP, grant me the serenity to accept what I cannot change, the courage to change what I can, and the wisdom to know the difference. Progress and not perfection is the goal every day!