You wrote: "I do screw my two middle fingers clockwise looking at the shaft from above (going under and up on the shaft). The little finger is being put out of action by my putting it between the left hands index and long finger."
When you say "...clockwise looking at the shaft from above (going under and up on the shaft)," do you mean looking at the shaft from the golfer's perspective, rather than the perspective of an observer? If so, I don't understand your use of the word "clockwise." I believe that the two middle fingers of the trail hand (right in my case) should be screwed on to the club counterclockwise, or to the left, or toward the target. Blake was very clear about this in GSOTF where he wrote: "The right hand is placed on the club by taking the shaft in the middle and third fingers and 'screwing' the hand to the left.
Interestingly, Blake altered the grip slightly in GTTB. He "weakened" the left hand grip from three-to-four knuckles showing to a two-to-three knuckles showing in GTTB. The right hand looks a bit different in the grip drawings of the two books. In figure 22 of GSOTF the V between the trail thumb and forefinger appears to point to his lead shoulder and the back of that hand is quite visible. In figure 6 of GTTB the V not "screwed as far to the left (toward the target) and back of trail hand is less visible.