I'm modeling it after my Halo 5 avatar who uses an Air Assault Helmet. Unfortunately, I don't have the time just yet to really work with the available files. Additionally, I don't trust myself with an angled visor. So In the interest of time (and since I too am graduating from ODST to Spartan) I decided to purchase the Helljumper helmet from Beaver Creek proving grounds and go with it. I plan on revisiting the Halo 5 Air Assault in the future though.