Mini Switch for 7 Sound; on/off or on/on?

Either. Just don't wire anything to the other "on" position.

 

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If you can give up one of your #2 or #4 Quack switch positions, you can get rid of the push/pull and still get neck+bridge in parallel option.

Swap either the neck/middle or middle/bridge pickups in their pickguard holes (for the no solder option) or where they attach to the switch lugs. This gives you a Tele-style 3-way switch at one end (neck/'neck+bridge'/bridge) with the two extra middle pickup options at the other for still 5 different sounds.

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If you are looking at either this
https://www.stewmac.com/electronics/components-and-parts/switches/mini-toggle-switches-spdt.html
or this
https://www.stewmac.com/electronics/components-and-parts/switches/mini-toggle-switches.html

You want the on/on. The other switches on/off/on or on/on/on have 3 positions not 2.

 

FWIW I like to wire it like a G&L expander switch, this needs a mini switch and two wires going one each to the respective term.inaks of the five way.

I like it better because it's simpler to wire and because it doesn't matter if I am on bridge or neck, the switch gives me both regardless, or all three in either notch position (middle alone remains unchanged).

My .02

 

I use a mini toggle along with master volume/tone. I've never found having the separate tone controls that useful for me anyway.