I was thinking of using this wiring diagram for my guitar with a few changes:
-Instead of a push / pull switch I'll use the switch that used to go to the rhythm circuit.
-I'd use the Jazzy 3 way in place of the tele style 3-way switch specified in the diagram.
What do you guys think?
This should give me the normal "lead" circuit unchanged and instead of a rhythm circuit I get both pickups in series!
http://www.deaf-eddie.net/drawings/tele-series.jpg