Actually, I just drew it all out and it appears you can get all strings INPHASE with both on. Example, my J is south-up. The P is south-up on the low strings and north-up in the high strings. Therefore, if the J is CW, the high string P is CCW, and the low string P is CW then you should get RWRP high strings and in-phase, but not humcancelling, low strings. This is what I believe I have as I mentioned earlier a wire-swap of the J made things worse... especially the high strings... aka: OOP. This still doesnít address why thereís a dull drop with both maxed though... sigh.
Copperheadroads, why do you believe a switch would work better than 2 volumes? I donít follow?