My friend uses a Prince EXO3 Silver OS which has a 118 square inch frame. I also used to use the same racquet, but have never had any problems with it. About three days ago his strings broke at the second to last cross near the bottom of the frame. Then he got the racquet strung with Babolat Pro Hurricane 16 strings at 58lbs and the same cross broke again today. Could anyone explain whether the problem was frame or what.