Hello all, new AA flyer with a flight from PHL to BCN flying the 787-800. I am 6'6 and 300 pounds and am trying to figure out the best seat for my wife and I. I see on some Youtube clips that seat 20 D is a bulkhead seat (more legroom) with a foldable armrest. I would much prefer that over a fixed armrest. Am I correct that that seat will have one moveable armrest? Thank you so much!