I needed a ceiling mount for my DBPOWER projector. It's pretty small and light and I didn't want to spend money on something that might not be what I want. Pretty much the point of a 3D printer. I wanted it to be able to have angle it and be able to pivot it if need be.

UPDATE 8/15/18: I've uploaded a version 2 for the ceiling mount part. I've added a better brace for the back and thinned the joints a little to give better tolerance when joining the pieces. It works wonders and holds the two parts together much more solidly. time will tell, but the failure of the first part did happen. I might not have happened if I did a higher infill, so you could choose to use higher infill just to give it more grip, if you want to save a little bit of filament, but I don't think it's worth it.