I use 30# braided dacron fishing line that has been waxed. I tie a uni-knot around the string, leaving the loop a few inches in diameter and the tag end 8-10" long. Then I wrap the cat whisker sheet around the string with the un-separated fibers running parallel to the string. You can't get them really tight while wrapping, because they will start to pull apart. While holding the whiskers, slide your uni-knot (slip knot) over the middle of the whiskers. Carefully pull the knot down tight. Use the two ends of line to tie around the whiskers. I use alternating half square knots. When you get about three or four knots, tie them off with a full square knot. Carefully trim the ends close to the knot. If you aren't careful, your knot will slip here. I then use a flame to bead the ends right up to the knot. Perfect round cat whisker balls every time for me. I hope this was clearer than mud.