I had a Voltric 7 racket. The original string was got loosened and I strung the rocket with BG66 ULTIMAX @ 22 Lbs. But when I am playing the feel is not that much hard,lack of sound and power less.The Stringer said it was strung @ 22 Lbs. Basically I want play Aggressively with so much power and hard hitting sound. So Please Recommend me a string and its Tension so that it fits to my play.