If I had a vote, I would say P-39D/F/M and P-400s as one grp, and P-39N/Qs (later varients) as another. The D/F/Ms and 400s all have wing guns, and are earlier models, where the P-39Ns often had the wing guns removed, so they are really identical to P-39Qs.
...As for "Air-A-Cutie" ya, nice skin, I think the serial # does identify her as a P-39F, as per the other sources listed.