Once again, thanks for all the helpful input, Lyric.
I'll do a bit of searching on the internet for some references, and if I don't find anything I'll do just that. To be honest, one of my existing blue-tailed P-47Ns is on far far thinner ice, reference-wise, and HTC let it in (turns out after the fact there are tons of references, I just didn't have access to them at the time!)