I feel like you're looking to start another argument/debate (which is what I seriously feel like every thread on here always becomes) over something that is an individual preference for each stringer.Bump
As I read what you posted though, this is what I picked out: "The USRSA does not recommend this procedure".....and "Here again, the USRSA believes this to be an unnecessary procedure".
It's not a science.
Heck, even using the knot button isn't a science. It's just preference. My preference is to use it because there's clearly tension lost on a tie-off string. I just do 8% for everything, just be consistent with what you do frame-to-frame.