Dave, thanks for the link-I have adjusted the humcancelling pots and have most of the noise alleviated, but there's still some nasty HF content that I can't seem to eliminate, especially from the bridge pickup. The symptoms match Mica's qualifications for the upgrade exactly, and there's not much I can do about it at the moment, but the hum isn't audible when playing, so it's not that big an issue for now.