Wanted to mount a LCD Desktop Clock on the wall so made a shelf. It sticks to the wall using 3M Command Strips. Installed 2 M3 Brass Press Fit Inserts (https://www.mcmaster.com/94510a030) into each of the 2 supports. Attached Shelf to 2 Supports using M3 x 6mm Socket Head Screws - can use 8mm and 10mm as well. Passed power cord through notch in the back of the self.

Rotate Support to be flat sideways on the bed and print 2 of them.

Supports not needed and used 3 perimeters with 20% infill.

I printed mine out of Clear/Natural PLA.