Did the older configuration of the 777 have a second handicapped lavatory in coach? If so, they could remove the one that's located where the front of PS is now. To me, the lavatories between D1 and PS on both sides of the galley seem to be the same size, although I obviously haven't attempted to measure them. Similarly, I don't see a size difference in the lavatories in the front of the D1 cabin, although they're configured differently. <Do you want to pee parallel to the movement of the aircraft or perpendicular to it?>