Let me correct myself in saying that Traditional Teaching methods want the forefinger and thumb to pinch together ala Ben Hogan. I must agree with you in observing the photos that there is a space between the forefinger and left thumb. I thought perhaps that this was an oversight. However the photos also illustrate that there is a difference in the abount of left hand turn between a weak left hand and strong left hand.
If a space is allowed between the forefinger and thumb on the left hand in a weak single action grip, then how does one resolve the "seems like a problem" left thumb not seating perfect with the grip(ie. thumb pad not in complete contact with the grip). If I turn my left hand like the photo of the strong single action the thumb seats fine. Does it matter?
Yup, the usual grip that 'traditional' teaching has the thumb and 1st finger pinched. The 'weak' single action and weak in the sence that the left thumb and pp3 is turned to the top of the clubshaft. To do this grip is problematic to do due to the fact to get the no.3 pressure point on top it is hard for the right wrist to not be turned from vertical. It is 'essentially' possible though. The left wrist will remain unaffected(and is a likely result of the no-gap between the thumb and forefinger style when the wrist is flat to vertical) to repositioning the left thumb and in the photos 10-2-A/B, it is exactly the same as the strong single action grip in 10-2-B apart from the fact the thumb is now on top of the clubshaft instead of aft. Anyways what I'm trying to say is that the strong and weak single action differ only in the location of the pressure points - ideally they will not be 'turned more' from vertical.
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