Stringing instructions updated for PowerAngle racquets

We've updated the stringing instructions for all PowerAngle racquets, and included the specific instructions for the new PowerAngle Pro. Note that there are a couple of significant differences in the new stringing instructions, so make certain to review them before doing your next PowerAngle restring job. USRSA members can find the instructions on the "specials" page, which is linked off of the main page for the Digest on-line.