You don't want to use a Kumihimo disc for that cable. 1) I don't think it would work as the braided part of the cable is too think. 2) Kumihimo braided are very tight, which you will not be able to do with that wire.I'm doing a 8 braid of twisted pairs as that's what the norne draug uses (I think. From the photo below it seem to indicate that's the method being used).
I'm doing the draug braid mostly because it looks cool. A straight 8 round braid would yield the best eddy current reduction, but cool is cool amiright?
For 8 wires just braid by hand.