Hi Joe, do the pickups have 4 or maybe 5 wires, where the 5th is bare and probably wound around the earth wire? If so, 2 of the 4 should most likely be paired together, and these are the ones required to do coil splitting.

Sounds like your build has just master volume & master tone and probably a strat style 5 way switch? To do the out of phase stuff you may need to buy 2 mini DPDT switches which are on-on-on. This is very important as some are on-off-on. Reason being in position 1 = Series or humbucker mode, position 2 = split single coil mode, position 3 = Parallel or out of phase.

Check out this old thread for some ideas where I posted how my Son's Strat Copy was Hotrodded.... http://www.buildyourownguitar.com.au...ead.php?t=4981

Hope some of this helps.

Cheers, Waz