Answer to 1 & 2 is yes. The answer to 3 is no. So I will try your suggestions.
I'm in US central time zone but I regularly collaborate with colleagues in Sweden Switzerland and Australia, so no worries about delays. Whoever is available whenever is fine. I just want to give you some feedback on things than might need to be added or clarified in the instructions. But overall, the installation and setup was pretty smooth, it probably helped that I had a P4B with "Buster" and an old version of node-red already setup. I'm also retired so I have no set schedule.
One of my early tests is on my main desktop I have the dashboard for my AI system running in a Chrome window and your dashboard from the Pi4B with the default four stream display in another Chrome window. My dashboard regularly goes dead with "Aw snap! something went wrong" and needs a manual refresh to start working again. It will be interesting to see if yours is free of the problem. It may very well be a node-red version issue, my system is v1.1.3 -- its been running a long time, "if it ain't broke, don't fix it!" and my issues seem to have started after some Ubuntu 16.04 updates. But if mine dies and yours doesn't I'll update to at least the v 1.3.1 that I have on my Pi4B.
I'll be attending a 50th reunion tomorrow so probably not much more will happen until Monday.
Edit:
One weird issue I just noticed is the Camera-2 mini display has gone blank but if I click it, Camera-2 displays in the main window.
Edit2:
Clicking the presets button brought back the Camera-2 small window display.
