One of the reasons you slice the ball is something you have been told all your life in golf, you hear it constantly all the time by teachers, and to me it is one of the most ridiculous statements you can make in the golf swing. People are told that from the top of the golf swing they should pull the handle of the club to the ball. Well there is no way if you ask any engineer or anyone that knows physics, that you can pull the handle of the club and hit it with the clubface or square the clubface to the ball. The only way that clubface can square back to the ball by the laws of physics is that from the top if the handle is in the correct position it must come back to your chest, and that is the only way that the club can then square back to the ball. There is no way that you can pull the handle down to your waist and not be outside/across or be in a position that you would have to flip your hands. This will always be across the ball and if you are across it with an open blade it is always going to be a slice. I will show you that from the down the line angle. The more a person pulls the handle down on the downswing the more across the line of flight he is. Now, from the top, all great players tuck their left elbow in, some feel that works the toe of the club, but from the top that is the only way the club can square back to the ball. That is the equal inner force of centrifugal force and the equal outer. But as long as the handle is being pulled down on the downswing you can never square your clubface to the ball.