Recently I've installed a few DCC decoders in my son's equipment so that he can run his engines now that track is being laid. I have some nice thin flexible wire but would soon need more. I was reminded not too long ago about a potential source for the thin flexible wire that's perfect to use for decoder installs, PC ribbon cable!
Being that I build my own computers I naturally have a lot of old parts and cables stashed away. Old hard drive ATA and floppy disc drive ribbon cables are what you need to find. Cut off the cable ends and just like string cheese, peel off a few strands. In my example below, I had a fancy ATA cable that was designed to improve air flow inside the PC case. Even better it has three colors of wire to pick from! I hope this little tip can help you save a few bucks on DCC supplies!