A simple bracket with printed pin to hold a 608 bearing as an idler or tensioner for GT2 belts that fits 4040 extrusion. Print with a tight brim and the little bits of brim left attached will hold pin in place. Alternatively the pin has a hollow for an M5 bolt but in my experience this isnt really needed. The model includes 2 identical pins, one may fit nicer than the other or a may get nocked over and fail so better safe I figured.
The author marked this model as their own original creation.