I have an idea for a fixture for prototyping segmented tubing for welding. The core is a bunch of ball jointed segments. There's a balance in making ball joints that snap together firmly without permanent deformation, and (in this case) printability in making something that won't pop off halfway through the print.
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@smellsofbikes is this print-in-place or did you snap the parts together?
@mavica_again I snapped them together. I'm nowhere near adventurous enough to do print-in-place, generally speaking.