This is a modular propeller that you can attach to anything you can drill a pencil-thick hole in. It's probably not stable enough to propel your bed, though. Don't attach too strong motors.The scad file is modular, that is you can adjust various things like the pencil diameter and so on.There is are two modules that can be used to debug wing attachment. I had to make the holes for the wings epsilon larger than the wings for them to slide in perfectly.The parts are fixed to the pencil using two short M3 screws (like 10mm or 12mm) (length is parametric). You can screw those directly into the PLA.  If you do it by hand the screws cut their own thread.