RC Helicopter connector

There is a small plastic part which connects the helicopter blades to the balance weights at the top. They are connected by ball-joints, and there are two. These parts successfully got a helicopter working again, working from the single replacement part I had, and a little juggling of the sizes. The helicopter is a cheap brand labelled "Night Hawk"

It was designed in FreeCAD.

Printing was with PLA, with 100% fill, and a fine resolution (0.1mm). Print-time is very fast as they are so small.