I would advise against it as well. One of the best points about good shooting form is to have minimal contact between your hand and the grip of the bow. The less contact then the less of a chance that you will torque the riser. The form-a-grip would seem to me to do just the opposite by increasing hand contact.

I would suggest that you continue to experiment with different hand positions. I had a problem with several bows in recent years as I tend to prefer a high to medium grip position but all of the bows in question had grips that were designed for a low wrist setup.

A custom grip might eventually be a possible solution.