I have a classic Wilson PS 6.0 85 that I am going to get re-strung soon. Will likely be using full natural gut (17g) or a good multi like Tecnifibre's NRG2 or X-1 Bi-Phase both also 17g. Does anyone have any good suggestions for string tension in order to increase the power and sweetspot? The PS 85 is obviously a very low power racquet. I presently have it strung at 63 pounds with NRG2 16g. It takes a big swing to get the ball moving. I am looking to try and increase the power and sweetspot by lowering the tension, but I don't want to go too crazy so that it loses control. Any suggestions on a good tension to string it at with either 17g natural gut or multifilament? Thanks.