A side question here, is ET deliberately using equipment based on tickets sold, or are they just trying to resolve the daily puzzle wheen choosing equipment? Shipping my mother in law with 715 in a few days and noticed that the last two weeks is a lovely blend of 777, 788 and 789 in both configurations - but never a 350. This route used to have a 788, then 789 fairly consistently, but it's been all over the place for some time now.
I will of course check within 48 hrs and reallocate her if she strikes lucky with a 1-2-1.