that I should stop experimenting with different setups thinking this will result in significantly different performance outcomes. For the record, he is very good at adapting to whatever racket he happens to be swinging, even if, for instance, I hand him one of mine to hit with, he always settles in and starts grooving nice strokes after a few minutes, regardless of whatever he is hitting with. I consider him to be a polished 4.0 level player whereas I am a low 3.0. He prioritizes adapting to the racket over making it adapt to him. I contend that a sharp tool is better than a dull one, and certain setups simply provide advantages over others. And customizing a racket is not necessarily a bad thing, in my view, even if doing so discourages becoming better at adapting. Where do you guys come down on this friendly debate?