If the weight goes to the trail foot during the backswing, the hips are turning with the shoulders. If the weight is balanced between the feet, I believe you accomplish a great deal of tension inside the legs and it should be enough for them to start the downswing. The ideal position is really to have the hips move forward as far as they can go while keeping the head pretty much from its original position. The position of my forward foot is very important because it helps my hips to slide a little bit more to my target. This foot is almost pointing to the target. This swing demands very good flexibility from the back and hips to get to the positions Mindy Blake wants us to be. Doing my drills on a regular basis helps me to improve on Blake's positions.