I'm currently using kason Carbon 3.0,n i strung it to 25lbs,with a 0.66 string,which is over than the racket's suggested tension,22lbs.I know it happens alot.The thing is that when i asked the stringer,he said it's ok if it's 3 lbs over,which also means the guarantee is still valid.Moreover,whenever i wanted to try to strung it harder,my coach said.."even Taufik Hidayat only uses 26lbs tension,can u hit harder than him?"..that bothers me,to think that even some ppl,(not pros) still strung them up to 30 lbs.I still feel that i can play more than 25lbs.But how can i try if my coach always bothers me with that kind of question.I got the power,he also admits that,so why not? I mean,is that true that Taufik only uses 26 lbs tension?How about other pro players?Then how come even some of not-pros players still uses such a high tension? Anyway,what's also bothers me is that Yonex,esp in my place,really stood on the suggested tension.Like NanoSpeed 9000,n most of the other yonex rackets,were only limited to 19-24lbs.N they told me that if u strung it over than the suggested tension,then the guarantee will be invalid.Is that true?I mean,even Oliver,Toppro,Flexpro,n maybe some other brands can even get strung at 30lbs or over. I wanna buy a racket which can be strung at a high tension,at least more than 24lbs.Before,i really wanna get NS9000X,but now,it's kind of dissapointing to know that i cant really play they way i wanna play,afraid of the invalid guarantees.U know..that thing aint cheap. So,can i strung NS9000X or other YY rackets above the suggested tensions?N is it true that Taufik or other pros will not have their rackets strung at more than 30lbs? Admit it,Pros got powers more than ordinary ppl.Then,how come ppl still strung their rackets at such a high tension?Was that just a showoff?