I briefly experimented with poly when it first came out, but didn't like the feel, and I was very keen on my existing set-up. Now I'm wondering if there are poly strings that seem to work well with serve and volley tennis. . . any tips? Does this make sense---I can understand the use of poly strings for a hard-pounding baseliner grooving on the spin, but not so much for serve and volley. Interested in your thoughts. also, has poly gotten better in recent years for holding string tension?