I saw a picture of edberg and it reminded me of a lesson i overheard a guy giving (the guy that can hit 130). he advised people to open up like a big league pitcher where your arms are stretched out really wide. when moving like this it kinda feels like your stretching out your chest, too. I was trying this today and it added a lot of pace to my serve. Do you guys have any experience with this? When I try this I tend to exert more energy and really try to whack it. Kinda of reminded me of the hip stretch advice I learned about on here.