This looks like a great feature!

I have two questions:

1) What does "from the last 90 days" mean, exactly? Created in the last 90 days? Updated in the last 90 days?

2) How does this interact with the "Default" update sets? Do they need to be marked "Ignore" in the target instance before cloning? Any special considerations so they don't collide with their cloned counterparts? Or are they just ignored regardless?