Wow, impressive.
I had literally fired up my Windows machine, installed Linux services and Ubuntu 18.04 LTS. Got binwalk up and running, hit the jefferson missing part and then installed the full set of dependencies for binwalk.
Extracted the filesystem and just at that moment thought I would check the thread to see if there was an update. :0)
When you say ask them for the source, would that be SoftAtHome or some other party?
This all looks potentially possible considering the basic moving parts seem to be identified. However, I am definitely now well outside of my comfort zone knowledge wise and really appreciate your efforts so far. Do you think you can take this any further?