It eventually did what it needed to do & all my channels came back up. It took about 18hrs and I suspect that I prolonged this with my tinkering.

I tweaked some settings to hopefully reduce the start up time for next time.

My UPS now only runs the little NUC so I should only lose the data connection if the power goes out. The power was out for almost as long as my node was.

Time to investigate my new node.