Sorry for those of you guys that have started to unfold this or have even started to build this but I have noticed a slight problem. There was just a slight problem in the geometry as you can see here.
If you know anything about 3D modeling you will know that you never are supposed to have a polygon that has more than 4 sides. The goal is to have 4 sides but sometimes you have to suffice with 3. When I was modeling it I didn't realize that I had a couple of polys that had 5 sides.
Now to talk to those of you that have already started unfolding this or have even finished unfolding this. I am very sorry about causing this trouble. I think if you want to continue to use your unfolds you should be fine considering the polygons that are messed up are fairly flat. I am posting the new files though so that way the community will have error free models making everything much easier for them. Like I said I am very sorry and I do believe you unfolds will still be able to be built.
The helmet's scale is base of the scale of the base helmet without the crown on. I am guessing it should be right about the same as a MK VI (maybe a little bigger). I think 29, 30cm max should do it. Hope that helps.