I just strung my two vantage racquets with Kirschbaum Competition at 46 pounds (21 Kg). I normally have it strung at 50 pounds (23 kg). I lowered the tension because it's a monofilament string...the thing is...the racquets are like a cannon now! Can't keep the ball in play! Is Kirschbaum Competition the kind of string where you should lower the tension or should have kept my regular tension?