I created another post about an alternative way to tie a tether versus a standard figure eight loop with a girth hitch (http://www.saddlehunter.com/community/index.php?threads/tether-option.21553). In researching using the scaffold knot, I found the following video that anyone trying to use a scaffold should watch prior to their first use. Doing it wrong can kill you! Thanks to @Squirrels for prompting this post!