by now I've seen multiple halo costumes, but when I first saw them I thought that it would be awesome to be able to do something like that, and started looking at tutorials, where I first saw about the 405th. To be honest, when I first looked into pepakura it seemed like it was hard as heck. I also knew of the rep with the 501st and when I saw the 405th at first, I thought it was kinda the same, but when I looked into it more, I found how the community here is, and well...here I am.