[lagster]

Let's look at real world evidence. Most pros have the leading edge either "square" or slightly "open" at the Top, because most have a neutral grip with a Flat or slightly Bent Left Wrist at the Top. Amateurs have it all over the place.

I agree with you that amateurs have it all over the place.Does the flat left wrist fix this fault or is that too simplistic?

I'm not a teacher but I see this all the time with higher handicap players and how would you go about fixing it?

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The TOP position is important... due to the effect of the 3rd law(action-reaction). However, golfers do seem to be able to play well from many TOP positions of the clubface. This shows that the TOP position can be important, but not as important as "HOW YOU BRING IT DOWN."

Lee Trevion describes himself as "a blocker," because of his STRONG GRIP and Top clubface position. I think he has done pretty well "blocking."

The Strong Single Action Grip, which is more of a "neutral grip"(in common golf lingo) usually gives more of an appearance at the TOP of the Square Clubface, and fairly FLAT Left Wrist(not arched). This allows for Horizontal Hinging, or what many would call a FULL RELEASE.

So... GRIP, WRIST ACTION, and HINGE ACTION, all working properly together, is what many people need.