I just saw questions about wow Guage fire the dna switches, I just thought I'd add that on one of my DNA40s I used the wires out of telephone cable, worked great, cones with 6 or 8 different colors. Here's part of my wiring job..:
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I used the ribbon cable from an old floppy drive out of a computer hulk I have laying around. Worked fine. It's only a logic function and doesn't carry any significant voltage. I think it was 28ga.