Hi all I am pretty new to all this string talk. I recently broke the string on my head Extreme MP racquet and my tennis club restrung it with: Babolat PRM Blast 17g and Babolat Pro Hurricane Tour 16g. 55lbs. I played with it last week end and I now have pain running through my right arm. The string felt ping-gy, plastic-key, and had no bite. I guess this is because my racquet is strung with a poly? I just cannot play with these strings. I now need to re-string the racquet. Could some one please help me out? What strings should I use? I read the string forum and quite afew people like the Technifibre x1 biphase string. Should I string my racquet fully with this string or cross it with another string? If so, should I cross it with a poly string or another multifilament string? Should I cross string it with a Signumpro hyperion 17g or 16g? Also what tension should I string my racquet at? I've been reading so much about strings I am strung-out! Please if anyone can help, that would be really great. I've been to a few of the tennis pro shops in Sydney and they don't seem to be too helpful. They tend to want me to string it with whatever string they have - like Gamma TNT 16g. Thanks in advance. Skyepie.