Is the back drop during the serve really about leg drive? I am not so sure, because when I do basic serve drills to get used to the timing (no jump, not too much rotation etc. Just working on the swing), I feel like I do it more relaxed (not feeling forced or being in an unnatural position which is how serve feels to me), a drop happens on its own. It is the same with the over head shots. I do not do the leg drive but the racket can drop back (even if not too deep). So, do you wait at the trophy position and really let the body rotation, leg drive etc do the back drop, or before that you slightly begin to move the racket lower bending your arm from your elbow?