Slightly OT but am I the only person in the world to have read and thoroughly enjoyed Bob Prest's book 'F-4 Phantom?'. IMHO it's one of the finest books ever written about FJ operations -- wonderful stuff.
When he reads this thread, my cadet is going to ask me whether Vne for a fast jet varies a great deal with height (translation: his instructor wants to know before he gets asked the awkward question!) I assume it also varies quite a lot with fit?
Just to put it all in perspective, the Vigilant has a Vne of 121kts. I suspect most current fast jets stall at higher speeds than that!
John