Friend asked me for a solution to hang his acoustic guitar on the side panel of a shelf, so i remixed a beautiful hanger for this specific need. I added a hook on the back side. Tested it om acoustic, ukulele, guitarlele – it holds okay. 

I printed it sideways on Anycubic Cobra 2 NEO, 0.4 mm nozzle, 0.2 mm layer, with 3 walls and 25% infill