[Amen Corner]

If you think HH is an effect than something is wrong. It is Hinge ACTION and Hinge MOTION. Not Hinge effect. It is Rhythm- TGM Rhythm. Roll is Rhythm. And that is the distance the clubhead travels because of Acc#3's transfer roll with the left arm and clubshaft INLINE with identical RPMs. Your Hands are not Educated if you can't perform without a pivot three distinct and separate Hinge Actions. Look at the toe of the clubhead and see where the Action ends in relationship to the Plane Line. Roll-HH, clubhead is parallel to Plane Line. Half Roll (no roll)- AH, the clubhead is 45* to the Plane Line. And No roll (reverse roll)- VH, the clubhead is 90* to the Plane line. Hinge Action is controlled by the Left Hand. That is a major function of the left Flying Wedge. Hinge is rhythm. Roll is Rhythm.

When a Swinger substitutes a long swivel and roll or when a Hitter relies on the driving right arm to execute their respective Hinge Actions, Homer called that- in his own word- “Inferior.” It makes clubface alignment (ball control) “fleeting and erratic.” Without knowing how to perform all three Hinge Actions- you know none of them since you can’t distinguish the difference. Hinging due to 'effect' is a short cut.

Educated Hands with Left Hand control of the clubface allows the G.O.L.F.er to execute the proper Hinge Motion- in this case a Angled Hinge Action even with a "long" swing. Hinge Actions don't know Swinging from Hitting, although a skill level of the Hands and Golfer are important.

6b,

How important is it to have FLV left hand at impact to be able to execute the different hinges?

If a player has a turned left hand, that will affect the face at your checkpoint.