I recently bought a used bike with Dura Ace 10 speed components. The right shifter has some scuff marks on the outside plastic part which may have been from a crash and probably caused the shifter to rattle. It's not a big deal as when I ride on the hoods, which I do 80% of the time, the rattling stops. I wonder though if there is any steps I can take try and stop it or do I have to live with it. Thanks in advance.