[Daryl]

Follow DOC's advice for sure. 10-2

But think of this too. Hitters Rotate their Grip. I assume that if you play a wedge, that its farther back in your stance, and rotated closed a bit (because playing it back opened the Clubface: Up on plane). If this is true, then your Driver may be gripped with your left Thumb on the Sweetspot Plane but on Wedges, a little more to the side of the Grip.

So I guess if you took your grip at Impact Fix for each of the different Clubs and had a Vertical Left Wrist, then you should discover this. If it's true.