Joint (Low Profile Ball Joint)

One more joint !!!?
Unfortunately yes, but I really think I will not do others ...
I hope the images are self-explanatory enough.
I have tried and I believe I have found a way to best optimize the distance between the spheres, when more joints are placed in the chain to make an articulated arm, maintaining a consistent bend angle and above all the characteristic of being able to adjust continuously and finely the clutch with the same method of the small rubber layer used in the version of the other two-ball joints, of which I will leave the link below.
This is fully printable in PLA (like versions 3.0-3.1 and 3.2 of the other) and I had no problem with 0.2mm layers (turn off support and don't change bed orientation).
Excessive elefant foot can be a problem, if you can't eliminate or control it, better activate the raft.
A running-in period and a work to settle the threads that have rather tight tolerances are necessary (I prefer to suffer a little with the plastic threads at the