Re: p90s: can they be wired to a 4-way switch like a tele?
I did that on my Tele copy. I had to rewire the leads on the bridge pickup so I could seperate the inside coil lead from the ground.
I also have a phase switch. I like it when it's out of phase in series, with the tone rolled down. I use this guitar for slide, sounds very honky, kind of dobro like.