Re: Proper way to tie an aikido obi?
The u-tube that Joep Schuurkes suggested (by the Rener Gracie) is a good presentation. The "butterfly" fold that I discovered during my research and have been using ever since, is the one referred to as the "super lock variation" by Gracie.
It is excellent and takes a lot of work to become undone!! Give it a try, you'll be pleasantly please to not be constantly tightening your belt during class!!