How do I add a moderator to a single space?

For what it is worth, the same approach works with the PMPro adapter — the membership side is identical from here.

Strong agree. Good defaults beat a wall of toggles every single time.

Tried this on a staging copy first and it behaved exactly as described. Confident enough to roll it to production now.

I respectfully disagree on one detail. In my setup the opposite held true, though I suspect it comes down to community size.