I have only done a few wiring MODs but hoping to get some input here I have a standard Strat with 3 l'il killer GFS rail pickups I want the exterior to look stock but want to use 3 push pull pots. I also want to keep the stock 5 way switch
I have been looking around and haven't seen anything with 3 humbuckers and 3 pushpulls.
Wondering what the best options would be and how it would be wired.
JohnH's "Strat SP-HSS version uses 3 P/P pots to give a huge variety of options. While you have 3 HBs rather than one, you could build this scheme exactly as is, simply by treating your N and M HBs as if they were two-wire SC pickups. They're not split in this scheme, only the bridge HB is split.
JohnH's SP, however, does require a Superswitch.
Since you're using rail HBs, splitting these to SC operation may not be too satisfying, since the individual coils are so small. You might want to consider a scheme which just wires HBs in series/parallel and omits the coil splitting
For that, you might get some inspiration from ChrisK's HHH LP scheme. This uses 4 push-pull pots, but one could certainly be eliminated. For example, there is one used as a phase switch for the middle pickup, that could be scratched if OOP sounds are not of interest. This scheme uses a regular Gibson 3-way toggle, but modifications to the basic plan could be made.
If you prefer not to change the switch, then I reckon you could do a lot worse than just wire it up as a standard strat wiring, and use your three switches to do series/parallel wiring on each individual pickup.
The advantage of that is that it is easy to work out and wire up, all settings are humncelling, and it would be inuitive to use.
Amongst the various things it wouldnt do are the following, with reasons why you might be OK not to have them:
Pickups in series - with all those jumbuckers, you already have plenty of thick series sounds
single coil sounds - with the narrow spacing of the rails coils, they will likley sound fairly similar as single coils to the coils in parallel settings.
Out of phase - fun, but does anyone actually use it?
Tou can't combine B and N pickups, but you could consider adding a neck-on or bridge -on function later using one of the tone pots.
Another advantage of doing a fairly simple wire up first is to let you listen and explore the basic sounds of your guitar and pickups, through your amp, and then decide whether a further scheme should move towards thicker or thinner or brighter sounds etc.