any time. I made it with a program called Pepakura its free to download and if you go to 405th.com there are a large number of files for it that have helmets and armor schematics. From that point you open up the program and the file and then things get a little difficult to explain you will need to scale it to your head. Once its all to scale you cut out the pieces and fallow the 3d model to make a paper replica. after that its fiberglass resin time. Thin layer on the out side let it dry, then fiberglass the inside with the resin and the cloth batting this time that gives it stability. Then I spent hours with bondo The automotive kind not the stuff with fibers. that's used to smooth it out and get the right shape in some places. that's a lot of sanding and re bondoing and the trick is to go in very thin layers that way you sand less. Then carve details and cut out the visor portion of the helmet. its best to build that along with everything else especially for the ODST (I've thought of making that one and the visor makes me shy away every time) I would suggest a vacuform machine for that one. after that was the paint job. not complicated but better shown than spoken. so when you get there let me know and ill help you out.