Here's a general question: Let's say I have a racquet that I like playing with, but it's light -- say, under 10 oz. If I were to add weight to the frame in specific locations to bring it up to, say, 12 oz. and retain the same balance, would it be "the same" as trying to find a new racquet that has similar swingweight and balance? Or is there something special about a racquet that has a heavier "stock" weight distribution that would make it superior to a lighter racquet that was leaded-up? Obviously, I know that the different frames will play differently, but is there any specific reason why a lighter racquet that's got weight added to it wouldn't be as "good" as a racquet that was heavier to start with?