Yep, that's about it. The 744 is a stable fleet - no new ones coming in, no old ones being retired (aircraft, that is!). The A340 is getting 4 or 5 new aircraft a year. That started two years ago and will continue for several years. With around 8-9 crews per aeroplane, that requires a large training effort. For a number of reasons, the training didn't start in time to build up a manning buffer before the aircraft started arriving, and we've been playing catch-up ever since. So the A340 roster isn't that stable, particularly for captains. For FO's - particularly new ones - the roster is fairly stable. Having said that, as an example, the trip I'm on right now is the first I've had since last year that has changed from the roster. Hardly a volatile record!