i just tried gut poly (bb alu rough 16l mains, bde ralleye 16 crosses, my stringer messed up, i wanted gut mains poly xs but whatever.) i broke a synthetic and then switched to the racket with the gut poly set up. HOLY CRAP. it was unbelievable, right away my shots got more power and bounce, control, everything was just like 10 times better. theres no way of putting this. gut poly is the way to go!