Hi @piplaw, thanks.
The tool is available to use, a couple of companies are already using it every day. The tool is not simply a GoogleSheets plugin because the main logic is running on a server as this is too complex to handle within Google Apps Scripts alone (and the whole logic with keys etc is also more safe running safely on a server anyway).
So it requires some minor initial setup from me (ca 1h) to make it run for another client at the moment. And of course since there is computing power and support needed, it is not totally free.
So feel free to contact me at: lo [at] dim28.ch if you want to try this out for yourself.
I will write to you directly for more.
Best,
Lukas