After months of searching, I finally found a cheap Cybertron Unicron to get started on my Classics Bludgeon project. Sadly, after painstakingly taking both heads apart to swap them, I found that they had rivets plunged deep in the plastic. I have no idea how I can get them out and switch them around (after doing extensive mods to Unicron's helmet, that is). I'm hoping there's a way I can do this while retaining the head's mobility. Pics of both heads, opened, are enclosed. Can anyone help?