How to modify for Push/Pull on HB for splits?

[Top-L]

I am rewiring my S540 with this diagram. But Ideally, I would also like to have single coil in neck and bridge.

With a single Push/Pull pot, how would I modify this diagram to ALSO do a coil split on the neck and bridge?

BTW, this diagram is for Vai switching. The 2 and 4 are parallel between the middle and split humbucker.

 

[Top-L]

Nevermind. I found the Egen18 wiring diagram which does this and more.

I wired this once before on a guitar I sold. Wonder if I'm up to it again?

 

[jeremy]

cool how the middle position is different, i dig it!