Hi, I am about an intermediate player (playing around 2.5 yrs) and have a Yonex isometric 865 (http://www.badmintonalley.com/Yonex...n_Racket_p/racket-yonex-isometric-865l-bl.htm) and the stock string, I think it is bg 65 at 21, lasted 1 season of high school badminton and also playing several times out of school until the string broke recently. I believe that the string continually lost tension until it finally snapped. When I played with my racket, using the stock string, I found it quite difficult to clear from baseline to baseline because I had to put a lot of strength into it, and I also had to hit very hard to generate more power. When I used a friend's racket though, I felt that it was a bit easier to clear (maybe string?). So, since I want more power but also a good amount of control, I have been looking up the BG 80, but I have also looked up Microlegend xl, but it seems that it does not offer as good control as bg 80 from research and it moves around a lot. However, Bg 80 is 0.68 and XL is .73, so is XL supposedly more durable, but if I use a lower tension like 21 lbs for bg 80 since you're supposed to string bg 80 about 1-2lbs less than what you want, would the strings still last very long? I know I do mishit sometimes... Also, I found about Ashaway Flex 21 Micro: http://www.badmintonalley.com/Ashaw...ton_String_p/string-ashaway-flex-21-micro.htm http://www.ashawayusa.com/Flex21.php and feel like trying that too b/c of it's ratings for durability and control and b/c it's 0.70 mm. Please help me chose. Thank you for your time.