Do you want to free up some space on the ground? Then you need the dorm bed longboard holder. Easily assembled and remountable, not yet tested for more than 24 hours, but feels pretty good.

Added another file, now fits msu ~¾ wood beds and 1" steel beds
Print orientation:
Prints in multiple pieces, make sure to split into objects inside of Prusa Slices. Keep the holes inside of the arms pointed up and the bars flat.

Parts should be pressed into place to assure no board falls.