I just got a valve index and found it odd that when removing the built-in headphones to use your own the leads are exposed, and they didn't bother covering them. It's not a big deal and safe to leave exposed but I thought it looked goofy, so I made the plug to cover the leads up. it's a snug fit and snaps in well. I used black filament, but it would look cool with other colors! might be cool with logos or something.