Thanks - I’ve set up a staging site for some deeper messing about with chat and some other things too.
Regarding Theme Creator, it might help in making the showcasing of chat (or should I say DM) customisations more accessible. Take your point that an auto-destruct would be needed. Isn’t that already there as a configurable site setting?
Yup, got that in place too. The issue is that I don’t want my dev to have admin access to our production site due to the sensitive data within - this is required in order to mess with Theme / Component settings.