I don't think the FPH2 is particularly accurate at all so on that basis I think your argument is flawed. You're making an assumption about the FPH2 and its accuracy and it isn't one I agree with based on what I've seen.
I do agree it's your model and you should do what works for you but I also think that if you are basing your model on a flawed fan sculpt (or whatever on earth the FPH2 is) then you're going to struggle to escape the limitations of said piece. All the helmets available to us have limitations of one sort or another and that includes the helmets with known lineage like the MR, GMH, CTM, MF etc. Regardless of my opinion of the FPH2, or any other helmet, I can't see how it would be preferable to use it as a reference when there are so many photos of the real helmets in the gallery. That doesn't make sense. If I was aiming to complete the best paint up replication of a helmet I wouldn't look at pictures of a fan painted helmet I'd look at pictures of the real thing otherwise I'd be trying to match someone elses attempt to match; any mistakes they'd made would bleed into my attempt at that's accepting that there are some fine painters out there.
