Alright, I fixed the mount hole to be the proper size.
NOTE1 - You'll need a 1/4"x20 screw, I used a 1" and then just used a nut as a lock. Otherwise, you'd need one that is 1/2" long - Lowe's didn't stock that weird size.
NOTE2 - Shelf isn't deep enough for the wire/antenna to be against the wall. I never intended for it to be since it would need to stick out another inch. (If there's demand, I guess I can extend it - but this thing works great.)
I added of the install pic.
| camera_shelf_fixed.stl | 421.9KB |
![Tube Corner Joint (3 Way) [25mm] 3D Printer Model](https://res.3axis.co/025ac40f-0c58-48f3-83c0-64db51747566/images/da5f532f-528c-4997-b700-9bb6f5d738c5_thumb.jpg)