Here is my stealth mount headphone hanger... I hope you like it.

Features:

Easy print in any filament with no supports (lay the wall side on the bed)
Easy invisible and self leveling mount with one screw
Curved to keep headset from falling off
Relief for easily grabbing headset and/or cable

Instructions:

You will need one screw to mount (or you could use double sided tape). It is designed around a #6 sheet metal screw that I had already, which has a 6mm diameter head and a 3.5mm width thread. It's basically just a normal pan head screw like what might come with a small drywall anchor, not a countersink screw.

To install just leave the screw sticking out from the wall a couple turns and slide the mount hole on the back over the screw and pull down on the hanger with moderate force. The slot is tapered so if the mount seems loose and swings around, tighten the screw a little closer to the wall and try again.

You can sell prints of these if you like but you must keep the same open license for any derivatives... and please don't remove my watermark. Enjoy!