OK, you may recall that wiring arrangement I came up with a while ago...
Well, after mulling it over further, I've refined the idea a little, and was wondering if this would actually be possible to do...
HSH arrangement, with one push/pull tone and one push/pull volume, plus one mini-toggle and a five-way switch.
Five-way with both push/pull pots down: Ibanez style switching for the two buckers...
1) Neck humbucker.
2) Outer coil of neck humbucker.
3) Both humbuckers.
4) Inner coils of both humbuckers.
5) Bridge humbucker.
When the volume pot is pulled up, it goes into split coil mode, effectively converting the guitar into an SSH arrangement...
1) Outer coil of neck humbucker.
2) Outer coil of neck, plus middle singlecoil.
3) Middle singlecoil.
4) Bridge humbucker plus middle singlecoil.
5) Bridge humbucker.
The tone control acts as a coil tap for the bridge humbucker, that splits it regardless of what is selected on the other two controls (mainly for getting Eric Johnson-style lead tones by selecting the bridge single coil and rolling the tone off a little).
The mini-toggle is a 'blower switch' that bypasses all of the above, and routs the bridge humbucker straight to the output jack.
Would this actually be possible to wire up, or am I being over-ambitious?
Any thoughts or suggestions are welcome!
First of all, if I may ask, are you really sure you want to wire your guitar like this? You would have like 10+ options to chose from, that's not always a good thing... I always got lost in the switching when I had such wirings in my instruments. More switching, less playing. Do you already have a guitar that has this much possibilities?
Anyway, I'm trying to help you with your question.
So let's see what you want to do with the volume push-pull pot...
1) Neck humbucker. -> Outer coil of neck humbucker.
Possible. The neck hb's tapping wire switches to ground.
2) Outer coil of neck humbucker. -> Outer coil of neck, plus middle singlecoil.
Possible, but you need another switching layer on your 5way switch. Connect the SC's "hot" to the positions where you ant to add the SC. When pulling the pot, solder two wires to the pot so you make a connection of the new layer's output to the usual output of the 5way switch. The SC's "hot wire" now switches to volume pot "in" (aka 5way switch "out"), adding the SC.
3) Both humbuckers. -> Middle singlecoil.
Not sure about that one. I think you would need more that just a simple push-pull-pot to realize this, because you already want to split the neck hb and add the singlecoil. So you wouldn't have any connections left on that pp pot. If you do the wiring as I said in 1) and 2), this would be "neck humbucker outer coil plus bridge humbucker (optional: plus middle singlecoil, if you wire the SC to position 3 on the new layer of the 5way)"
4) Inner coils of both humbuckers. -> Bridge humbucker plus middle singlecoil.
Same as 3), you would need more than a pp pot to do this.
5) Bridge humbucker. -> Bridge humbucker.
Well, I think that's absolutely impossible
Tone Control pp pot to split the bridge HB: This is possible, sure. The tapping wire of the bridge hb switches to ground.
Blower switch mini toggle: Possible. You would have to switch the bridge hb "hot" wire to the output jack AND have to disconnect the bridge hb's tapping wire to any ground connections (5way, split via pp pot). If you don't do the last, you might have a splitted humbucker in some switching states.
I hope it is correct the way I described it. It's always a bit hard to think about such complex wirings. So, you see it's not a matter of some wires put together, you just can't have some things while having some other features wired.
I did those wirings before and believe me, "less is more". My advice: Think about the 3 or 5 Pickup configurations you really want to have and go for them.
Hope this helps!