I have a set of used RC 440's but do not have any rubber accessories. Anyone know if I can use stock O-Rings and if there is anything else I need? I am also a bit confused by the fit issues people are having. Some people are using dremels and such. They are saturated and going into a B16. Thanks so much.

 

The installation instructions mention a new rubber cushion?

 

You have to open up the center hole just a bit.... About 1/8"