Spectacular aircraft, indeed. To the first one to ride the SXM fence right behind one of those monster engines - Carib's on me!
Armchair engineer's question about the folding wingtips - wouldn't it have been more efficient to have them folding down? That way, even if the actuators fail, they would stay up in flight as long as the wings generate lift, and drop down all by themselves after landing.
There's probably a good reason they made them the way they are. Just wondering, though.
Ideology: The mistaken belief that your beliefs are neither beliefs nor mistaken.