I was at a tennis camp the other day, and I found an old wooden racquet that had five poly strings in the mains. I asked my coach why this was, and he said the mains had broken, but they didn't want to restring the whole frame in fear of it breaking, so the person who strung it just replaced the ones that had broken. I tried out this racquet, and I was amazed by how well the poly strings worked with the wood frame. I got amazing amounts of spin and control. Beyond the amount that I would have gotten from poly strings normally. I feel that this is likely the result of the high flexibility of the wood frame combining with the polyester strings to allow massive ball pocketing and spin potential. Does anyone agree? Does anyone have any experience with anything like this?