Okay so I've looked all over the web, and couldn't find anything describing what the four knobs and the 3-way swtich do... I'm thinking that the switch is for the two humbuckers? I got the thing to sound the way I want purely by accident, Washburn states on their site that htey don't provide manuals for any of their stringed instruments. Does anyone have a J5 who can tell me what each of these is for? Thanks much!