I redid my Classic Vibe Mustang using 2 GFS humbucking blade style pickups, with a GFS 1V 1T push/pull pot coil splitting harness. I removed the stock 3-way selector from the harness and wired it to a stock Mustang Double Pole Triple Throw slider switch and set up the second slider to be an In Phase - Out of Phase - In Phase switch for the neck pickup. Sounds great. Here's the diagram if anyone wants to try it.