KF & LO - there is a difference between an X jet and an F jet when it comes to measuring success for this sort of thing. F-35C is an in production (well LRIP) aircraft, X-47B is a flight sciences technology demonstrator.
Spaz, the tail flash reminds me of a certain 800 NAS, however the first 3 UK jets do not wear any Sqn markings.
CM - check out VFA 101's CAG bird for an example of a coloured version!