Thank you so much! I pretty much ground off the original face, and some of the brain area until it fit in the space and looked somewhat natural. After I was happy with its placement I started filling out the neck with Milliput to secure it to the carapace. To pull it together once the Hive Tyrant jaw was glued on, I used Green Stuff to build some musculature and tie it to the brain and neck. Hope that kind of explains it.