It's pretty much a garauntee that it's a grounding problem though right, not outside interference? Can't I just hook a wire from point a to a grounding location? I'm sorry LATS but I don't know how to take a wiring diagram for a strat and turn it into a diagram for an LP with coil tap. :( She's very important to me and when she sounds sick it makes me sick. I'm gonna open her up and see whats going on because truthfully since the tech dug around in her i haven't looked at what he did.