Sorry this video is so long. I thought this would be an easy task, but nothing ever is. Half of this video is devoted to my clash with the wasps that had taken up residence in the old rear fan.
Even after I replaced and sealed up the new fans, I keep finding wasps returning to this spot. They take shelter under the cover of the new fan now, so I have to keep sweeping them out. They aren’t making my life easy. Eventually I will kill them all, though. So far, no stings.