Hello- this is my first post here. I have a semi-hollow bodied guitar. the bridge pickup is a Phat Cat and sounds awesome. The neck has a Dimarzio Air Norton, which has great tone, but is accompanied by a fairly irritating buzz. Everything seems to be grounded correctly, and I know my cable is good. If I touch my amp chassis or any shielding in the cavity it goes away completely. All pickups and hardware are brand spankin new. Do I need to ground my bridge? The strings and bridge are the only things that do not currently stop this noise.