Just noticed your discussion from late last year on the McTavish flextail circa 1970. He was a Greenough disciple at the time. Interesting titbit is that flextails still are made in Oz. The greatest proponent is Mitchell Rae at Outer Island surfboards,who first knocked one out in the late 60s and has been refining them ever since. He was busy finishing one for Rob Machado a few months back at his factory on the NSW north coast when I picked up some new boards. Check out his website at www.outerislandsurf.com