I am assembling a bass and I'm considering either P/J or P/MM pickup config. I know nothing about the way MM pups are wired, though. I assume there is a way the coils can be split, but what are some of the available combinations? Are they like two pickups in one housing that you can switch between? If that's the case it seems like pairing one with a P in the neck position could be pretty versatile. Any ideas/ suggestions would be great.