So, are you in the extremely specific situation where you have a triple-monitor mount with an exposed post and have no spot to put your Logitech C920? Well have I got an extremely specific solution for you!
Print instructions:
Once printed, unfold the built in clamp on the webcam, and place it in the cradle. There's a small cutout in the print for the hinge, so it should fit snugly in place.
Note: this is designed for a circular post with a diameter of 31.75mm.
Anyways, I hope this helps for probably the one other person with the same setup as me!
Simon
The author hasn't provided the model origin yet.