software

This will sound like a dumb question but here goes! I'm going to wire up my JB bridge, and a Jazz neck for coil split via push/pull pots. Should I use the volume, or tone knobs for the push/pull split? Or does it even matter?

I think it's just preference... I have separate splits (neck on volume, bridge on tone)

But, if you're going for just one - I'd prefer to use the volume, assuming it's closer. Then again thats me assuming you have a strat

Use the tone control. Most push/pull pots are built on mini-pots that often have lousy tapers. The tone control is much more forgiving of taper than the volume control.

Not every guitar offers the option of tone, or volume, tho.
My Kamikaze only has one volume control, which is push/pull for pup selection as well.
Of course, in this guitar, the taper doesn't matter, because you just keep the volume dimed, unless you're muting.

Sorry. I have an Epi LP with two volume two tone. I think I'm going to just use the tones from what I'm hearing here.