I don't know conclusively whether Anfi is right or wrong. I guess by the number of nay sayers that are vastly more qualified than I, that the collective knowledge would suggest the latter.
However, I do have to hold a degree of respect for anyone that thinks a little bit outside the box and is prepared to voice it openly. One of the things I have discovered in my 30+ years as a helicopter pilot is that many of the 'facts' I was taught as a junior pilot were utterly wrong. (See Nick Lappos' Urban Myths thread). I also happen to have a great deal of empathy with Anfi's 'single engine' logic that he thrusts upon this forum on a regular basis.
I applaud you Anfi for being prepared to challenge the accepted norms. Whether you are right or wrong is irrelevant to me really, as I don't plan on exploring Ultimate Coning Angle any time soon. However, I personally find the 'meat' of this discussion (not the purile mud slinging) very interesting.
JJ