i just played with this racquet about 1 hr ago and now i see it has good power compared to the other racquet i demoed (babolat pure drive team) which was weaker than my previous racquet. I played pretty intensivly for about 2 and a half hours. And my shoulder or arm started gettting tired but the weight wasnt as heavy as i thought. But my other racquet was really light so is it just that my arm is getting used to the racquet? Or does this mean its too heavy?