I've found myself modifying my thumb position of my left hand (I swing right) to achieve a fade or a draw. I think this technically creates a slightly stronger / weaker grip. If I put my thumb on the flag-opposite side of the golf club I find it much easier to drive the ball low and draw it. And the opposite is true for hitting a cut or fade or even flop shots. I literally put the right side of my left thumb on the flag side of the golf club to hit a soft cut or pitch shot.
I also move my left index finger. If I want to drive the ball lower and draw it a little more or even hit a straighter shot I hook my left index finger on the front of the club and push the club into that left index finger to lock it into place. My left finger is then at least half an inch farther down the shaft than my left thumb. The reverse is true for a fade. I move my index finger farther up the shaft. I feel like this has the effect of letting me cup my left wrist easier.
I don't interlock my grip and I overlap my right ring finger on top of my left index finger.
It's definitely helped with my control and consistency while trying to create different types of shots.
Has anyone ever heard of a pro modifying their grip like this on a per shot basis?
Does anyone else do this?