This is a shelf to be used in combination with the below:
Hook and anchor for chain link by Dominik ChuchlĂk | Download free STL model | Printables.com
It is very sturdy and I use it to hold my nebula projector. The shelf is pretty big, about the exact same size as a Prusa MK3S+ bed. I've only included the shelf here. The chain/anchors can be downloaded from the respective makers page above
Suggested to print in PETG for rigidity and around 50% infill. You may be able to get away with a little less.
The author remixed this model.