BB8 Wiggler version.

(Photo from LucasFilm promo)

"The Wiggler" is one of the BB8's used in the movies. It sits on a aluminium disc and can perform all but actual rolling. The disc/plate can be seen in the left picture.
(Photo from LucasFilm promo)

I've started with my own version of Micke Askernas exellent frame design.

This is the CAD-design for the 1.0 version.

To get a screen accurate look I spent a large amount of time to make new center panels with movable doors etc. Many builders paint the doors onto a large 3D printed part but that is not the way I want to do this.