This is a simple projector mount that goes on a bed headboard. You can place the projector in the slot, then also screw it in by drilling a hole in the side, and putting it through the foot used for changing the projector angle.

This is a design I fully created by myself, and it is designed in a way that there are no supports needed. At a size of 10"x10"x4", it should way roughly 300g(depending on print settings).