From some emails I received, I guess some folks didn't realize that I'm using more than one knitting spool/corker when I use different sized cord.
Here's a photo of 3 knitting spools that I made with the nails spaced at about 3/4 inch for the 1mm cord, 1 inch for the 'Type I'(1/16 inch) paracord, and 1.25 inches for paracord(1.5 or 1.75 inches can be done for a looser spaced out pattern on the regular paracord).
The spools and the napkin ring I used were found at a craft store(Michaels or Hobby Lobby). I drilled the center hole of the spools to enlarge them to 3/8 inch diameter and also pre-drilled the holes for the nails so I wouldn't split the wood when tapping the nails in. You can also make your own spools using hollow cylinder shaped objects like pvc pipe sections and plumbing fittings with epoxy/duct/electrical tape to secure the nails in place.
There are knitting machines that can crank out these sinnets very quickly, but I tried one and it would only work with yarn, with the string/cord I tried being too stiff for the machine to manipulate.
There are at least couple of pages with mention/diagrams of spool knitting shown in 'The Ashley Book of Knots'. I've found them to make great key chain and neck lanyards with smaller diameter cordage, and you get a thicker rope sized version from using paracord.
You can use just two of the nails for a smaller square pattern, like you'd get using a lucet.