I managed to get the pipe that I wanted, cut to the desired length, and put the SBC into it for sizing.  I'll have to cut the pipe down the middle so I can easily insert and remove the guts.  I'll also have to cut a hole in the top for the mirror mast assembly.  For the cutting, it's been recommended by a coworker that I use a table saw and some sort of jig to hold everything together.

I want to cut up some more pipe to help with the sealing and weather-proofing of the unit.

Endcaps will be purchased once I'm ready to retrieve them.  I guess if I don't get things cut up this weekend, I'll work on the software.

I'm skipping opencv as I'd have to get a better microSD card and I don't have that in my budget.  So I'll roll my own lib4vl grabber and dewarping algorithm...