Originally Posted by Xizel
What he's saying is actually correct. If you understand racquet polarization, you'll understand why mass at 12 (and therefore HH) is better for more spin and whip.
Carlos Moya, another spanish clay courter, used a sub 11 oz racket that was very HH to generate loads of topspin. I always thought that was funny because Moya used to wear the sleeveless shirts with the big biceps and he was swinging a very light racket. I think his SW was quite high though due to the HH customization.