I am constantly monitoring the quality of my work and the condition of your racquet and strings. Every time I string a racquet it is run through a battery of tests. First, I check string bed deflection with the Pacific Multitest Computer (right). Next I check the string bed with a Beers ERT-700. And then another test of the string bed with a Howe Flex III. Next I check the swingweight with a Prince Precision Tuning Center, then the overall weight, the balance, and then the flex of your racquet. All this information is recorded in my database. Most of these readings are printed out on your invoice. The string bed information is intended to help you track tension loss but I also use the data for predictive purposes. The other measurements are meant to help you in matching and optimizing your frames.