Hi there.
I long wanted to make a skull, and came across yours. It's fantastic, I love it.
I made my own model, based on yours. I basically copied the exact shape (except for the jaw, I had a different solution), but I built it, so the head opens, and there is a decent sized brain inside of it.
I wanted to share my model on Rebrickable.com. But since it's shape is basically yours, I wanted to ask your permission. I would, of course, link this page.
I also created some instructions. My idea is to just give it out for free, but if you have any objections, I would resepct that.
sincerely MyKidisanAlien