I have mine custom leaded to 12.6oz and play Alu rough @62.
I was fearful that the heft would be to too much but it felt lighter than leading the same specs to a k90. Also the stiff poly didn't shock my arm, probably because it was countered by the low stiffness of the racquet. Guessing.
"[Luke:] I can't believe it. [Yoda:] That is why you fail."