I plan on building a hayabusa andicant find and pep files. I don't want my peptoo get smushed.
Another thing that would help is howdo you do the details on the "mohawk" part.
-Thanks for your help
Just as Ventrue said, the Halo costume wiki has a hayabusa pep file. Also, as long as you use 110lb cardstock paper, you won't need to worry too much about it getting smashed. Just keep it in a safe place. Also due to using cardstock, helmets don't really need support struts. Normally the larger pieces like the chestplates need support struts and some do include them.
As for the designs on the spikes (crown) that requires creative thinking. There are different methods. You just need to think of a way.