Hi All: I have an old Musicmaster Bass that I have owned for decades. When I bought this bass, the in thing to do was mod the hell out of your Fender, so my friend & I did. Amongst the changes was installing a Dimarzio humbucker of that era complete with series / parallel switch. My friend wired it all up as that was way beyond my scope at the time. Years later he took the Dimarzio out and put an import EMG select pickup in which I never liked. I parked the bass for about 15 years due to an ever-increasing bass herd. Fast forward to now. I have renewed interest in putting the Dimarzio back in and reviving this bass. I took it apart and discovered what I consider a VERY unconventional wiring setup. I have no idea what my friend was going for by installing (4) capacitors to a single pickup / volume / tone setup. I am thinking I should take it apart and start from scratch. But my friend was no dumbass so I'm thinking MAYBE what he did was good. I need advice on whether to leave his capacitor nest or start over. I have attached a pic and a schematic of what I see. Does any of it make sense? Any help or advice is appreciated.