Turning with MPCNC and lost foam aluminum casting

Video of the turning of an axisymmetric foam model with my three axis MPCNC to make an aluminum knob with lost foam casting:

The tool used was fixed:

The initial piece was a parallelepiped foam:

I made a tool to take the foam in the spindle:

After the turning the piece had to be finished:

I finished it with sand paper:

And I covered it with quartz paint:

The model was inserted in the sand to do the casting:

The aluminum was melted with an electric oven:

And a raw piece was obtained from the casting:

To finish the obtained piece on the lathe, I made some supports with my 3D Printer:

Turning the mounting face:

And threading the hole to mount the knob: