Check out this site, http://s w e e t s p o t -o p t i m i s e r.c o m / No spaces, between the letters that are listed. You can also find this under sostab typed into a search engine. This seems to be a proportional stringing method, also taking into consideration of cross string friction and lengths, and main strings strung as a proportional stringing, as they list it as uniform deflection, and the only way to accomplish that is to string the longer strings at a higher tension than the shorter lengths. As you all know longer strings will deflect more than a shorter one at same tension, this is just an elaborate system to determine the tensions, nothing that new but taking it more elaborate is all, and categorizing each racquet out there.Seems like an elaborate proportional stringing method is all. On another forum, someone posted that it is hundreds of $ for one card of tensions for 1 racquet, I really doubt that many players out there even have their racquets strung with the proportional type stringing, yet alone this. They probably programed the different racquet patterns into a computer program, and after they determined the optimum tensions for one racquets individual pattern with respectable tensions, the others were probably then derived. Sounds very bogus for what is charged and what you would get. The USRSA even has a proportional stringing calculator on its web site to make a similar type of stringing on your own, so this ad does not look like anything revolutionary as it states.It is just that they are attempting to cash in on a proportional system that has been around for a while. BTW, has anyone here ever strung and used a racquet strung with the proportional method?