I learned of these beasts many years ago. I have enough trouble coordinating ten (oops. That's nine fingers)fingers playing on four strings perfectly. I don't understand how both hands operate entirely independently. Maybe I am simply developmentally disabled--or maybe one needn't be a genius to play the Chapman Stick? All I know is that I wouldn't dream of overtaxing my brain with one of these things. I freely admit that some people play the Stick amazingly well. Good for them! I thought I played hammer-ons well, but what did I know?