Not long since your last tilt at this windmill:
HarleyD, you are right in your statement, but perhaps the two pages of replies so far suggest's that you may be being a little churlish.
Centaurus has been passing on knowledge for quite some time, and it all remains relevant, even though some may be repeated, which by the way, has not stopped some very experienced Airline guys joining the discussion.
Anyway, I for one see value...