I didnt know anything about 405th when I was building this helmet, just really liked halo and wanted to make a prop helmet. I started with paper and paper mache to get the base form, then built on that with pva and tissue paper, then topped that with jib compound and clay, then sanded and painted it. The visor is just roofing and window tint with a clear blue plastic over the top. I have build pictures on a friends camera. but sadly I only just found this site, otherwise I would have documented the build better. Here's my latest build that i am properley updating if your interested http://www.405th.com/showthread.php/32902-Full-custom-REACH-build-NO-PEPAKURA/page2