I just picked up an Ovation Magnum II in a pawnshop, and I had a few questions for those of you who happen to own one. 1: Mine is lacking part of the bridge mute; the part of it that actually makes contact with the strings. The base is fine, it still moves up and down in conjunction with the lever, just the foam(?) part is missing. I wondered if anyone knows of a manufacturer that sells replacements, or maybe a substitute material. 2: I get nasty hum when I use the "NECK" or "BOTH" positions on the pickup selector switch. Am I correct in assuming that this is because all four coils of the neck pickup are wound in the same polarity? I could fix it by having two of the coils reverse wound, correct? Thanks for any help you may be able to offer.