Hi guys!
Thank you for reading. We need to have a tutorial that teaches a rather unique way how to deform a NURBS Sphere into a NURBS Cube with sharp corners and sharp edges -
a) starting from a NURBS Sphere.
b) Vertex max = 1024
The standard ways how to create a cube are known but here we need to know how to deform a NURBS Shere
See this image, the selected object still needs further adjustment.

Please post , any command or question. .