Anybody have experience hitting with Klip Zyex 16 or 17? It is a multi-filament string which is supposed to have similar playability to natural gut but with the added strength of a synthetic fiber, Zyex. Any thoughts or experience is appreciated! With a majority of the strings that I have tried I constantly struggle with string movement after a just a couple of sets of play due to a preponderance to hit with top spin. Any recommendations on strings that resist movement other than polyester? Currently hitting with a Dunlop m-Fil 300 strung with Klip Syn Gut Ultra-Fibre 16 at 62 lbs. A large number of pros hit with Luxilon polyester varieties. How are they avoiding the constant hazard of tennis elbow that is evident from hitting with polyester strings? Is it just a matter of strengthening the arm?