I just got an acceptance email on my 52nd FG natural metal 51B.
The RAF P-51B did had a problem with the alpha masking - the US insignia was still showing through. Turns out if you modify an alpha mask .bmp, you must include the corresponding non-alpha .bmp file in your submission, even if you didn't modify that one. I'm surprised I hadn't run into that problem before.
Anyway, problem fixed and skin resubmitted - hopefully it'll still get included today...
Congrats you guys! Looking forward to seeing them in game tonight!