I use the Pure Drive Roddick+ with a hybrid of Prince Syth duraflex 17 and Signum Pro Poly Plasma Pure 17, strung at 63 lbs. I have been considering switching to Prince SD17 only, and having it strung just out of the tension range of 66. Maybe start at 68 and go up or down depending on how it feels. My question is for the folks that string out of the recommended tension range. I know there is talk of frame fatigue and the high tensions can cause warping. How fast will the high tension deteriorate the frame? I don't abuse my racquets, other than the occasional scraping the court on low shots. What are your experiences with stringing over the recommended range?