The Ultima Gen 2 from O.C. White doesn't come with any mounting solution, and I didn't feel like paying $80 for a desk mount from O.C. White themselves, so made my own solution.
I was coming from a Elgato LP boom arm, so I designed the “neck” on the mount to be roughly the same height as the mount from Elgato. Your mileage may vary.
Printing recommendations:
*PLA can deform over time, even at room temperature, if left under load. I'm still testing this myself. If it turns out to be a problem, I will likely switch to an ASA printed part (PETG would likely work as well, but I don't use it so I can't say for sure).
Fastener hardware recommendations:
(Optional) I also applied some multi-purpose synthetic grease to the boom arm insert to make swiveling action smooth and low-wear. Probably not necessary, but it can't hurt.
The author hasn't provided the model origin yet.