The ball joint can be customized via the MakerBot Customizer app. To use all possible adjustments use the OpenSCAD file. The following adjustments are possible: wall_thickness = 1.2 big_sphere_diameter = 12 tube_inner_diameter = 4 spheres_distance = 0 model_resolution = 50 Rule of thumb: The big ball diameter should be approx. 10 times the wall thickness. Printer: Ultimaker 2 Slicer: Cura 15 Material = PLA/PHA Nozzle temp = 210° Print bed temp = 60° Layer height = 0.16 mm Shell thickness = 0.8 mm Fill density = 20% Print speed = 55 mm/s