I cant figure out what serve stance to use. I currently use the platform like fed and djok, but I find that I get mor power with the querry,isner,anderson,haas,mayer motion of stepping my right foot up to join my left one for a pinpoint stance. It gives me more time to get my legs bent and my whole body into the shot, The platform stance rushes me a little bit. What about the murray serve where he glides his feet together or the simon or wawrinka serve where they flex their body like a sling shot....Which one is techically the most efficient and effective use of the the muscles in the body to generate most power, spin etc....Biomechanically the best stance... The kinetic chain or whatever...you get what I mean Thanks for your help guys!