Installed carbon monoxide detector

Due diligence.  Found a battery (2 AAs) operated one for $20 from Ace hardware.  Jonny mounted it up underneath the nav table in the corner where our knees don’t reach.  We briefly looked into whether CO rises or falls–mount at the ceiling or floor–and discovered that it is the same density, so it will rise if it’s hotter, fall if it’s cooler, so it doesn’t matter where you mount the detector.  We chose to mount it under the nav table, up in the corner.