Remix of the 2 part Ankle joint to print them in place together. I had enough failures of trying to assemble the 2 part print that I went to tinkercad and put them together with a small edit on the ball size.

The print is small enough that there is going to be some thermal lock from it. The lower side of the ball locked together for me and needed to be cleaned up with a small file. The joint needed to be freed for movement after printing and is small enough that I used small pliers to hold each side to free it (if you twist wrong you will break it apart).