I also studied this particular Martial Art for a few years (middle 80's) and had to drop out because I had problems with one of my ankles. Participated in a few tournaments, and won a few trophies, but that was a long time ago. I had the pleasure of meeting Bill "Superfoot" Wallace when he did an exhibition. Supposedly, Master Byrne studied under the same instructor that taught Chuck Norris.
Anyway, saw your moniker and thought I'd inquire. Nice talking to you.....
Cool story. The man who started ITF is named C.S. Kim. Legend has it that he was one of Chuck Norris’ instructors when he was in the US Air Force and stationed in S. Korea. I hope I got all that correct. It’s been a while.