If it's got noise I've found a cheap trick that gets rid of the buzzin'. Take A.C. duct tape (the metallic silver kind) and line the cavity with it. Then run a ground wire from one of the pots and fasten the other end against the tape with a small screw. Be sure and solder the regular ground to the back of the bridge. Lot of 'em just lay under there pressed against it and you'll get some noise from that too. The duct tape works great and sticks very well as long as the cavity's clean and dry before applying it. Use scissors to custom fit it.