Not to hijack the thread, but I would like to broaden the question. I have a bass with dual J pickups. In 35 years of playing I have not used either pickup individually so it makes sense for me to go for one volume and be done with it. However in the back of my mind I recall that jazz pickups like to be loaded individually by individual pots. If they are loaded differently they still work but sound different. Am I talking garbage here? It would not be the first time.