Luggage Tag Knot for adding new thread in True Ring Needle Tatting

[rsmre]

Hi All,
I posted a question earlier today in the "How do I" forum about adding new thread when tatting true ring. I got a great answer from Judy, but I seemed to remember something about a luggage tag knot. Once the old tail is hidden, it shouldn't come lose, but the new thread could be pulled lose. The luggage tag knot solves this problem. Here is a link to the diagram courtesy of Georgia at The Online Tatting Class.
http://www.georgiaseitz.com/classes/takedaends.jpg
Rosemarie
P.S. I am aware that this may be called a lark's head knot, too.

[shindeco]

I didn't know this trick -- how brilliant!! Thank you.