Holy ****, this actually works. Removed test mode and just tried with Windows 10 x64 Enterprise - definitely works.
Not sure what the deal is but I notice that when I restart device in setup.exe now the screen goes blank, though the actual restart to new polling works. I have to restart setup.exe to "see" the changes now in non-test mode.
Just thought that was interesting. But seriously, fantastic job on this, did you pay for this out of pocket?