Sculpting a Human Skull in Clay_part-2

Last time, my first Skull sculpting was a 2" clay sculpture of a Skull that I held in my hand all the time I worked on it. The clay stayed soft due to the warmth of my hands and it was hard to work on and add details.
With this second Skull sculpture, I'm using PVC pipes as Armature that is mounted on a wooden base and I'm making it a bit larger this time.