Went to the B&M today to get some 1mm ekowool, and silica for my 1/16" dia. coils to try for the heck of it. They didn't have any. all they had that was close was .6mm silica, so I got a little of that. Doubled that over then again for four strands and got it thru the coil. Doesn't seem to be overly tight and try it tomorrow to see how it works, or I could pull one strand out. The ekowool, I'll have to order on-line to try out. But for now see how the silica works out.