While you’re here Smin, regarding the Hawk 200 RDA, have the devs considered allowing the Skyflashes on the outer pylons? I don’t mean getting four Skyflashes, I just mean being able to run two Skyflashes & two drop tanks (and the wing tip sidewinders)
I doubt the VT-4 is for internal testing. It was likely ordered as slight variation alongside the Norinco VT-4 to save costs, but the addition was delayed because the timing around V-J day was so bad. Now it’s sitting in the files to either be eventually removed or added, just like many other models have in the past.
US might just be the internal testing ground nation. There is an American AMX-13/75 and AMX-13/90 in the files. I think it was part of an old event though, but it has no unique event tag (like _event, _race, _football, etc.)