I recently found some info on people modding their teles from a 3-way to a 4-way switch, giving them both pickups in series and parallel. The first thing I wanted to know is how do the two sounds differ? What's so special about the new fourth position? And second, I play a Melancon P90 Artist loaded with Fralin P90's. I have a three way switch and an unused 3-way mini toggle. Can I get a 2-way mini-toggle and wire it up to switch between series and parallel when the main 3-way switch is in the middle? I assume this will work with P90's as well as single coils? Thanks in advance for any help!