I strung my new sticks with Klip natural gut mains 18ga and Isospeed Professional 17ga crosses. I have used the Klip 18ga many times and like it. First racket was strung at 55/58 and the second at 52/55 as I was told to string the Isospeed a little higher because it immediately loses tension. Both rackets had a crisp feel, very deep pocketing and excellent control. I kept going back to the 55/58 setup feeling the 52/55 had a little more power then I wanted. I like the crisp feel. I restrung the 52/55 setup with my first set of Pacific Classic 17ga gut and X1 Biphase 18ga crosses at 55lbs. Mushy feel, no control compared to my Klip/Isospeed setup. What is making this setup so bad, the changing of the gauges for the crosses and mains? Going from the Klip 18 to the pacific 17? The Biphase vs the Isospeed?