What Larry Wise does with the tag ends, isn't what I'd call a knot. He take the tag ends and does a few cross over weaves. When I make a string, I find it very convenient to get the tag ends out of the way before I serve the end loops. This weave serves that purpose. It takes only a second, and in addition it helps to close the loop when the string is under tension. To me, it's easier to make a string using Wise's method. I highly recommend it.