I just installed the Seymour Duncan Musicman replacement system (pickup and preamp) - Alnico p/up - in my Stingray. It was pretty easy to install. I love the sound. However, I've noticed that when I touch the pickup pole pieces with my finger (while not touching anything else like strings, bridge, etc) I hear a buzz. Any idea if this is normal? If not, how can I fix this? Is this common with Alnico pickups? I believe that everything is properly shielded and grounded. The pickup cavity, control cavity and pickguard are all shielded. I have the pickup grounded to the volume pot. The input jack is grounded to the bridge. Any help would be much appreciated. Thanks!!!!