Hi all, My newly aquired Rickenbacker 4001 seems to really lose output when both pickups are cranked (sounds like phase cancellation). Rolling off volume slightly from one pickup restores the girth, but it's finicky and one bump and my volume/tone is all gone again (probably a new lower value pot would help). To reverse the phase, do I simply swap the hot and earth wires from one of the pickups around? I notice that the neck pickup has two earth wires - are they common, or...? (i'm not too knowledgable on how pickups are wired) thanks!