Skull Top with hollow inside

Used several tools, to make a nice inside shape into the originally solid model of http://www.thingiverse.com/thing:882776

* meshmixer
* FreeCAD
* meshlab

andfinally used Blender to slice it into 6 sections, so that a Tinyboy Fabricator can print parts for a life sized skull.

Boo. Did I scare you?