Ukraineball, all the airliners are super impressive, but one thing to note is that Cathay's old livery is not white at the bottom (the new one is though), but a lighter shade of teal.
Nice work on the 757s, but you should check the position of the tulip and orientation of it on the starboard side of the rising blue livery. The tulip should be left of the wordmark, and the tulip itself is mirrored right now.
Those are some handsome looking B-52s! But knowing the Brits, they will probably try to Anglicize it by sticking Rolls-Royce Conways on them or something, but that's just me.
Aren't we also missing some missiles on top? Or is that also not a thing anymore (Disclaimer: Haven't drawn for a while so I'm not exactly up to speed with the specs)
Wikipedia & Universe - The pictures you posted are all from the left wing, and the 707s uses turbocompressors instead of bleed air to power cabin pressurization system. Since the 707s only needed 3, Boeing decided that they will not put one on engine #1. Side note - The Boeing 720 only has two turbo...
AFAIK the toolings for 757s are all gone, and it makes no economic sense to rebuild all the machineries to build a 1980s airframe. They may as well build a new 757 replacement based on the 787.