@penguin42 You over-estimate my technical prowess ... I understood most of the words in that, but honestly didn't understand any of it.
My experience is that working with me on things like this is an exercise in frustration, because people describe things to me in clear terms, and the processes fail in ways they cannot understand and say are not possible.
For this problem I've tried several things, and always there's a step in the middle where what they describe has no matching to what I'm seeing.
So ...
I'd love to get this working, but I don't know how to proceed.