The TW Powermap feature has become an irresistible resource when I shop for a new racquet, but I wonder how accurate and reproducible the measurements are. So I have a few questions. How many times are the measurements repeated for each tested racquet? Are the measurements repeated with additional racquets of the same model? Are string type and tensions the same for different tested models and brands? Thanks and I apologize if this has been already discussed in the forum.