Basically a ball joint that can be printed as one piece with minimal post-print modification. (UPDATE: I added a version for printers that can print with dissolvable support material)Print with 15% infill with a raft. The size of the joints in the provided files is the smallest I've been able to print it. After it is printed, take tweezers and remove the small piece in the opening at the bottom. If you're printing the dissolvable version, then select the dissolvable support option in your slicer. (NOTE: You will need at least a dual extruder printer.)