Wirbelsturm - that may indeed be the case at BA where there are career FOs who want to be senior on the 747 rather than junior captains elsewhere. That is not the case elsewhere, and were those guys to leave BA they would find exactly the same questions asked of them as are being asked of aces low. The BA guys, however, do not have to worry due to the system in place there, which is nice work if you can get it. I am not in any way having a go at aces low, who faces a difficult situation, but am merely mentioning the elephants in the room that in my judgement are likely to be the principle sources of difficulty.