Under desk headphone/headset holder

Just a simple remix of @dreimal_8's nice simple headphone holder.

I changed the size of the holder section and thinned some elements that didn't need so much material for ample strength. I also removed substantial amounts of material with some through holes to make it lighter without any loss of strength. Then various mesh fixes and simplifications, chamfers and such.

The holes open some opportunities to manage cords or attach other items as well, I've found so see how it works for you. A couple of screws mounts to the underside of your wooden desk.

Thanks for sharing your design @dreimal_8, it was a good starting point.