I'm really liking the chestplate. I started mine out of foam too, but I noticed something different. I used the same file you did, by L3X, but I noticed that the area around the arm openeing is different than mine. Did you add that yourself? I like the way it looks, but L3X's file does not seem to actually include that. He DOES have part of it, but yours looks much different than what the file actually has.