We lost one of the clips that holds the overhead appurtenance. Of course Nuna sells replacements but the price was a non-starter for me. So far this works pretty good. I took some liberties with the design, including making the pocket for the crossbar a bit over-sized. That way you can fill that sucker with hot glue and then just mash it together.

I printed with the cylindrical feature aligned vertically, to maximize strength around the circumference.

Enjoy