Programmed and machined a T-800 head from thingiverse:
Here is a finished scull video from all sides: https://youtube.com/shorts/mdclf5LvdyM?feature=share
In the 1st op I milled the base with a 1/4-20 tapped hole right where my Z0Y0Z0 will be.
Then I mounted the base on a square fixture using the tapped hole. This way as I index the square fixture in the vise, my part Z0Y0Z0 remain in the same spot.
2nd op was the back of the scull
3rd op was the face, and the 4th and 5th were the sides
Here is a YouTube video of some of the 3rd op machining. Warning Loud Noise!