Not sure why Bob replaced his nose cone, but it could have to do with the "clicking" sound many of us hear. I've been assured it is quite normal and shouldn't cause a problem. After doing quite a bit of research on the net I have found that it IS in fact very common to hear a "clicking" or "ticking" in the nose cone under idle in a roots type (Eaton) supercharger.

Ok, now back to the shooooo!