Got my new Rev Solo II installed, tried it out for the first time today, it sounds pretty good except for a vibration or rattle on the A string low B note. That's the most noticeable buzzing I'm getting, there's some very quiet sorta buzz on some of the low notes of the E string, around the G area. I tried moving the pickup around some but it didn't seem to help. Anyway, there was a black rubber piece that came with the pickup I guess for damping purposes, would putting this on eliminate the problem, and how do I go about putting it on? Or is there an even simpler solution?