Originally posted by the fool
... But all four spaces are already occupied by either a double concentric pot, a push pull pot, or by a hexpander pot so I am not to sure how we can preserve the stock look by adding 2 push pull pots- unless we drill additional holes...

hmm... well, I gues it's time to get out the drill...

You and Incidents Happen should get together. He keeps dreaming up incredibly complex systems that will do everything but make the morning coffee! LOL.

Three Double-Pole-Double-Throw (DPDT) switches will handle the task. One for each pickup to select series/Parallel. One to reverse the Phase of one pickup releative to the other.

The DiMarzio website has wiring diagrams to show how it's done. Click on 'Pickups' and then select "Installation and wiring".