Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4880801.
Quick remix of Darrelll’s excellent design I found here: https://www.thingiverse.com/thing:4405189 all I did was increase the angle to 40° because in his photos it seemed a bit tight and we don’t want to stress the motor any more than necessary. I also fixed it so that Cura no longer says it’s not watertight. Apart from that, identical to the original. Kudos for the initial development. Since this is a utilitarian part, I decided to use the low-quality profile (0.28mm in Cura), but I did give it 4 walls. I printed the first one flat, so no supports needed as the angle is only 40° and it turned out fine. However, orienting the print vertically (as in Darrelll’s original STL) will give you a stronger part where you need it the most: where the “clip” meets the “flap”. So, I did my second print vertically, same settings (0.28, 4 walls, 0.4 line) but this time with supports. I also added a brim since the footprint is quite small. Takes a bit longer, but should be worth it in the long run. And not only that, but it also turned out way better because for some reason the “clips” are a lot squarer and give a much more positive click when assembling, resulting in a stronger “joint”. Based on this experience, I’m uploading the model in the vertical position because it’s definitely the way to go.