When i first started it, i had on/off switches for each pickup, and a separate volume for each, then a master volume and tone. Not a lot of choices. So then i had a look around, and realised that i could utilize this:
If you think about it, the bridge MM has 2 coils, the P and J could act as 2 coils, then the 2 outputs from those switches could act as a third set of coils, which means there are 3 super switches, then a vol and tone. I can get a wide variety of sounds from it too. Like the J and bridge coil of the MM in parallel. Or the P and J parallel. or each coil in parallel.
I have been asked about it a few times, so i think ill have to make a build thread about it sometime soon.