Limpinhitter, you are also summing up why I focused in on Brian's video. Not that his corrections of the tucked elbow and the boy's racquet head were not great. They were. But experts get caught up in forcing every kid into the same latest dogma. The pat the dog is now a focus for boys at that facility. As we saw in the video, the boy and parents focused on the term and the position as the cure all, and not understanding the logic behind the reasons. That many times leads to hitchy strokes. Another reason why I am not a fan of showing kids detailed video analysis of themselves. They tend to pick out one or two position corrections and practice them over and over. They can end up with some robotic strokes that are not highly functional under the pressure of a tournament. I prefer to know the correction in my own mind, then devise a way to correct the kid naturally. You can use feeds and voice prompts to have them get that elbow further out, shorten the take back, pull the racquet butt through. They may indeed end up patting the dog, but they get their in their own natural way.