Desk Mount Headphone Holder Cable Lock Block

As much as I loved @Beaver's remixed Desk Mount Headphone Holder, I kept running into one tiny, yet annoying, problem: My cables kept falling out.

I made an ultra-simple part that fits into the farthest cable channel and blocks the top of the inner two channels to keep your cables from escaping. That it. Super simple print, no supports needed.

If you run into tolerance issues, scale down the lock to 99% or so. A bit of slack room won't hurt anything and could make it easier to fit into the headphone clamp.