Marcia, it was Doug Lenko, I saw him doing a demo at Cotton Corner and at the group lecture at the Blue Gate. He's like 22 and has had his own business since he was 14. An amazing young man! Here's his blog link: http://antlerquiltdesign.blogspot.com/ and this is the YouTube video for the ruler: https://www.youtube.com/watch?v=N0d2t354T4M