There’s an inherent flaw in this design. Simply put, the field of view flares as you go away from the plane of the lens.
If for example the view is 3-in square at the lens, an inch away it might be 3.5-in square, and so on.
If you follow that design, you’ll find that your camera view is obstructed by the shroud at the bottom and on both left and right sides. I considered this design (and the accordion) when I needed something similar.
I never even attempted, because I would need to know the value of this flare angle, as well as how much the tilt angle is.