I found a couple of balls but they do not seem to fit. Just out of curiosity, how big should it be? Should it be able to slide down the mbc until it just pokes out of the narrowest part of the nozzle, or should it just sit on top of the widest opening of the narrowing nozzle? I have a ball that does each, but it slides down the middle of the spring. Bah. I cant wait to get this up and running again, the car feels so slow w/out it and the BOV makes tiny little fart sounds instead of the strong wooooosshhh.