Just started playing with the 2015 version of the 104. Love the mix of control/power, low flex, and large sweet spot. Looking for some good strings for this stick. I'm a 4.0/4.5 all courter, singles/doubles, good physical shape. In my upper 50's so not too crazy about poly; looking for something that maximizes the traits of this racquet but still easy on the arm. Suggestions? Thanks!