Here's a pic of him without the helmet
I did the old hair dryer trick. took me about 20-30 min. It was a pain, I had to keep reheating the plastic for about 1 min. every few minutes. He's glued on tight from the back so I had to exacto knife that part of it very carefully. Using a flathead screwdriver I kept trying to pry him off little by little from both sides of his helmet. For me, this helmet was much harder to remove than the palace guard one because of the triangle shape of it so the top I had to cut away while keeping the screwdriver in place leaving me an opening. After removing the head, I scalped him until the helmet was secured in place and glued it back on.
He's one of my favorite characters and I had to fix him to my liking.