Ball Joint Made Of Stubborn ABS Plastic With Support Structure

General purpose ball joint made of ABS. I'm planning to do more optional parts. 6mm bolt with nut place up. 4x3mm holes plate.

After some testing this support structure is good enough or at least I got them printed.

Update! A ball with 6M bolt hole and two nuts. So the shank is now adjustable. 9.12.2014 Also a cone shape base for 6mm bolt with 4x3mm holes.