I am in the process of re-wiring my Yamaha P-J bass which currently has one master volume, one master tone and one 3-way switch (on,on,on) for P,P+J,J. What I would like to do is re-wire it to maintain this configurations but add a push / pull pot for putting the pickups in series / parallel (not sure if it's worth it on a PJ but sounds great on my Jag). My concern is I'm not sure what pot to add the switch in, tone or volume, and how will I be able to accomplish this only when the toggle is in the middle position. To give you the heads up I have purchased a set of Dimarzio DP126 pick ups and a .047 Orange Cap. If someone could give me a little insight if this will work and how I should wire it up, that would be greatly appreciated. I have done some searching on the Internet and couldn't find any wiring schematics in this configurations. Thanks again for all your help!