Headphone holder for computer tower

I wanted a hanger for my headphones, and I didn't want to rely on an adhesive to keep them from falling on the ground. My computer tower is in a convenient location, so I adapted polxuriach's thing to use my tower as an anchor.

My tower measures 210mm across (see second photo), so I made my thing so it would span that distance. I designed it in two parts to make it easier to print, and easier for someone else to modify if they want to use this design later. The two parts fit very tightly together by design - I had to use a clamp to press mine together. It's now a permanent joint.