What I would like to know is the exact weight customization, string type, and tensions that the real John McEnroe does to make his racquet work. I have tried and tried and tried to use his latest Dunlop Maxply McEnroe with a whole lot of frustration mostly due to sporadic errors that just keep creeping in and I have trouble preventing. I am not saying that I have the proper talent, skills, or physical capability but I want to try. If I can customize it the way McEnroe does then perhaps it will help. He does it to help him and he does it for good reasons otherwise he wouldn't do it. So please let me in on the secret so that I can finally quench the burning curiosity that is in my mind.