Not so relevant now you've resined it, but during the paper stage, I'd try to stick to the lines a little closer (Particularly the visor which is off by over 1mm by the looks of it). Also, don't score unnecessarily (Again referring to the visor: If you avoid scoring, the helmet as a whole will be stronger and less liable to warping).
Another point I might mention is the order in which youconsruct the piece. You seem to have built from the neck up, finishing at the top like building an igloo. This can be useful if you're not sure of the size, but finishing with a piece surrounded by all sides can make glueing harder, and there is less room for error if you have not followed the lines closely enough (Leading to misfitting pieces, overhanging edges, or warping).
You seem to have overcome these issues very well though, so good job. I hope to join the JFO crew soon enough too!