Does anyone @ TW check the string tension of their demo racquets before they send them? I just received four racquets and the tensions are all across the map, which I can understand. But one racquet, the Wilson K Factor Kobra Team FX, has such a low tension that it is unplayable. It is impossible for me to get a good test of this racquet and is very frustrating. The tension is 10#!! This could have been checked because it is extremely obvious from the touch of the strings that the tension is real low. It kind of reminds me of one of those Walmart special racquets where the strings feel like a badminton racquet. I'll have to restring this racquet to make it playable and give it a good test run.