Adam: After hearing you perform with your Fiddle (violin) I want you to stay out from under that bus. Take the bus to a truck service shop and pay them to replace the valve. I'm sure you can make a deal with the tech. there not to play a violin and you will not chance damaging highly trained and conditioned fingers and hands. This is your Pa Pa talking Son, so pay attention. Trade him performance tickets for his work and you both will be winners. The Poggers that have heard Adam play will agree with this post.