I'm running the Carling switches with screw-on terminals, must be narrower than the ones you are looking at - I used 3/4" spacing on the holes, center to center, and have some space between them.
The real answer to this question is "Far enough apart that you can cram the wiring where it needs to go, and no farther."
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid 
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
Last edited by airguy : 03-12-2020 at 03:51 PM.
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