For you guys with a middle pickup you don't know what to do with, StewMac sells "megaswitches" that provide some interesting switching options for a variety of pickup configurations

http://www.stewmac.com/shop/Electro...gaswitches.html

I have the "E" model with a super distortion in the bridge, super 2 in the neck and fast track2 in the middle. I thought the switch may be a problem if I had a really powerful pickup like the x2n that would overpower every thing so I chose humbuckers that have equal outputs and different tonal qualities. I get some nice sounds out of it.