i need help on which Yonex strings i should put on my raquet.I am using an armortec 500. but the strings broke a few days ago. I am an agressive style player, and i have only been using bg 65 (not sure the tension is though). i really want to try out (for the first time) bg 66 or bg 85, but i wasn't sure if i could take the chance of using new strings, since i am going to be in a competition in about 3 days (i'll be participating only in singles). since i only have 3 days, i will probably have only one session to get used to my new strings, but i'm afraid i might not get used to my new type of strings and lose an edge over the competition. So here's the question... should i just continue on using bg 65, or won't it matter if i try other strings such as bg 66 or bg85? help will be greatly appreciated.