hello everybody this is Theodore, i am a intermediate player. I have a strong right hand and now im using vt80 with bg66u 23lbs. (my father string for me so i cant actually ask for more tension) The problem is every hit of my from my flick don't sound like normal its actually like the string are loose and the string move much from its usual position... I was wondering if i can change the tension to 25lbs and some other expert can recommend me a other yonex string, I'm a hard smasher and with 23lbs my smash dont go step even i pushed my arm down and flicked so hard.