Whenever you are making an athletic motion, trying to hit a target, there is some part of the body that is the 'guide' or better 'reference point', that you are focused on to get the object to the target. If you have a neutral grip, that 'guide' is (basically) the palm of the right hand or for some, the trigger formed by the thumb and forefinger being pressed against each other. (I like to feel the trigger's of both hands as being on a 'track', swinging on an arc), just realize they must freely rotate, right hand trigger over left, don't block. The 'tracks' are on the same plane as the shaft, left thumb, and sweetspot, except from hip to hip, where the right trigger is on plane with the sweetspot. It can also be helpful to think of the left pinky as one rail, and the right trigger as the other, just realize that it is the left pinky (butt of the club) that stays on plane the closest, while the right trigger rotates over it - like a hinge. The rotation is gradual, and constant and smooth, and in synch with the rest of your body - it happens, you don't 'do' it, except perhaps to get the feel, or to intentionally hit a 'big' hook.
For the V's to truly line up, the hands/palms are not in the same plane, and you can't use the right hand as your 'guide' without hooking it.
Of course there are many other variables and ways to get the club to swing on plane, but if your right hand is too strong, you won't have a good reference point in the right hand 'throw'
