EC-17 Holdout Blasters Death Trooper WIP

[EC-17 Holdout Blaster]

Hey all, looking into starting my death trooper, and bought this helmet off someone a little while ago, and noticed some flaws in the pieces, they were concerning to me, and maybe enough to not be workable without some major transformation, what do yall think? Below are some of the pieces I’m most concerned about.

[EC-17 Holdout Blaster]

If anyone has some ideas on this that would be great!

[DoggyDoc[CMD-DCA]]

Hi Logan. 
it is tough to tell from the photos.  The face plate looks a bit warped,  maybe warming it in a hot water bath before attaching it may help to make it a bit more flexible, then hold its form in the attached position once cooled.  With respect to the other parts, some sanding and Bondo may help to correct the imperfections.  
Maybe try piecing it together with tape and grabbing some photos, so we can see how it looks somewhat assembled.

[PiotrRasputin[TX]]

What maker is this helmet from?