Heyo,
Does anyone perchance know the wiring diagram for 2 Dimarzio humbuckers, 1 volume push/pull, 1 tone, 3 way switch with 6 positions (the stock one)? I'm googling and searching online but not getting any good results. The closest one I could find is from another sevenstring.org forum post, but the pickup selector is different from the stock one in the RG8 http://i.imgur.com/lL4zF5n.jpg
That's basically the same as the RG8 switch, just looks different. Any three way selector works the same.
Be aware though, if you wire the lead from the switch to the tone pot first (as in that diagram), the tone pot will act as a volume pot as well. That lead needs to go to the hot side of the volume pot.