series switching

I was thinking of putting a switch in my guitar that will put the three pickups in series. I'm pretty sure that this will work when the five way switch is in the neck position, but I don't know what will happen when the other positions are selected. I was thinking that, say, if it was in the middle position I would have the bridge and middle in series. Am I right in thinking that? and what about the neck+mid position? Will that be all three in series? and one more question, what will happen if I put a phase reversal switch on the middle pup? will it just not work when the series switch is on, or will I have the middle pup out of phase with the bridge and neck pups?

Any advice would be great.