Man that does really suck. I lost a whole freezer one time. I habitually check my freezers now.
It helps that I get ready for work right beside my freezers (inside an attached garage). And I'm just in the habit of checking it daily. It sucked losing all that.
As for skulls, read this over. There are lots of methods, and you tube videos that show how to do it and different methods that people use. But this gives you a general idea.
https://www.grandviewoutdoors.com/bi...european-mount
-Jake