That is fricken sweet man, great work and most impressive.
Please don't take this as criticism of your work, as as I have said, it is beautiful and most likely, this detail is accurate too, but the black Trapezoids on the back of the helmet and the black vertical stripes, just look... i don't know... out of place. like they were stuck on as an after thought. Maybe they should be indented or even raised from the surface of the helmet so they look like they have a purpose.
As I have said, it looks great and I am no expert. but they just don't look right to me.
JM2C
Troy