I just put a Sadowsky set on my 5-string Atelier Z and the B-string is producing a weird rattle. It is not fret buzz, it sounds as though something in the bass is vibrating, but it occurs on the open B and all the fretted notes of the B string. It doesn't happen when I play any note on any of the other strings. I have never had this problem with this bass, or any other, before. I've gone back over the setup just to be sure that it isn't a setup issue. I cannot figure out where the sound is coming from, and it does come through the amplified tone. Anybody have any ideas?