Hi David, also think this is a great start to weaning oneself from Zen ... thanks!

Question: I see references to both zervice and zservice. Is that a typo?

Some Prefer Python
ObjectScript Saves My Bacon
Yes, I am $$$OK

And those message schema categories are configured in the services and operations that use that SearchTable? And, just as importantly, have always been there? It's not going to index messages that don't have those assigned in the message object's properties.