So, the end of the flap of my mini split deteriorated and crumbled - from just age, I don’t know. The shaft of the motor just spun freely in the little nub, and the flap wouldn’t open. I tried glue, but the brittleness of the nub made it just crack in a different spot. So this is what I came up with. Just a small brag. To me this is what 3D printing is all about.