Updated V2 3-27-23: Refined the design to make it sturdier and the print a bit easier. I also added a cap for the screw to give it some additional surface area. Screws right in and doesn't require any glue.
I created this as a place to keep my headphones other than just tossed on my desk. The idea was to create a safe place for them and allow them to go into the lower power mode by putting them in the case. The hooks hold the closure flap open for easier insertion and removal. There is a slot at the bottom you can slip a cable through and then turn to keep it in place.
Be sure to print the screw at 100% to ensure strength. It may be difficult to insert the first time. Just make sure you align it correctly and it will catch.
I used Blu-Tack in the clamp and on the end of the screw to keep it from slipping. Any stick on rubber should also work.
I added a channel with a backing for easier gluing. Just add glue and clamp for best results.
The author marked this model as their own original creation.