I use the same exact grip on all guns regardless of the model, grip as high as possible, wrist extended and thumbs forward. strong hand thumb on any type of safety that there is and close to the slide, kind of feeling the safety and slide but not pushing on it. Never any problem. I even do the same on revolvers and I may curve the thumbs down a bit on a short cylinder model not to get burned. If you keep a digit low and under any control, you may engage the safety and also will have no control as the gun will recoil much more severely.