Thought its about time I post as well. I just started building my first foam costume using the pep method and am building the Mark IV as well. So far, I've just got the helmet done, but will have to do it again as it is slightly too small. **(I considered it a test build anyway since I've never done anything like this before)** I can get my head into it, but really have to force it on, and it bows a bit on the side.
I plan on using this helmet as a test for the rest of the processes (sealing, priming, painting, etc.).
The files I'm using are Stealth's edited version of robo3867's files. Thanks to you guys for providing these.