Small Universal Joint

A universal joint 15mm across. I used pieces of 3mm filament as the axles. Used acetone to glue the axles in place. A bit fiddly but it works well enough.
It's intended to act as part of a stewart platform style part.

A video using 12 universal joints in a Stewart platform is here https://www.youtube.com/watch?v=hRBGwyz43d8