Imagine how fast you would serve if you had a nice serve action. There's alot of problems there, one being you are trying to look and serve like sampras, and what is it with using everything he used? Seems a bit odd to me. Why don't you be yourself, not try to be someone else? Not sure how fast i serve, but it's a heck of a lot faster than that, sure you set that thing properly?
Wilson nPro Open
Luxilon Adrenaline 16L @ 55lbs