Coghlans has two versions of the wire saw; the single strand one that you tried and one they call the Commando Wire Saw. Their Commando version is an 8 strand stainless steel saw that is identical to the BCB saw and is even made in England. I don't know if they are made by the same manufacturer, but they look and cut the same. Retail on the Commando saw is about $7.50.

Semper Fi, George