I strung a racquet a week or so ago and I play at a 4.5 or + level, and I've played about 3-4 times 2 hours each and I already snapped a string. I do hit with a lot of top spin but I'm trying to find out if the spin snapped the string... but it seems too soon? I used wilson stamina 16 synth gut at 60lbs with a dunlop 200g from 10 years ago. I've always used this racquet but lately it seems I've been having this problem. Any advice? Only one string snapped right in the middle of the racket.