Okay... love the racquet and have been hitting with it for quite some time. Finding that my serves just aren't as good with it as say the K95 (which I can crush, place, etc). Want to continue with the 90 because of the ground strokes, feel, touch, etc... So any tips on serving with this stick. I string it around 62 and was thinking that a drop to 57 or so might give me the pace and pop on serves I'm looking for. Thoughts?