My static BB8, needed a stand. Else it just roles off. The stand part, should be printed 4 times. And can be connected with 4 1cm round rods. (I used aluminium ones). Then if needed extra parts can be added that lock the droid in position. As the picture shows you can use screws from the inside to attacks BB8 to the stand. These parts should be glued on.
BB8 3D model can be found on bb8builders.club
Please share your work in progress or/and your finished model on my Facebook group: https://www.facebook.com/groups/882163935539046/