I don’t remember your setup, but if you have a super on the hive, you should not officially use OA vapor. Either remove it first, or consider MAQS, which can be used with a super in place.
No super on (yet) – will consider doing a second brood box when the girls have built up on the primary brood box appropriately. There won’t be a super until next year, I think.
Now I just have to get a handle on the hive beetles I’m seeing… I killed about 6 of them last time I opened the hive.