Taking care of little things while waiting for the DAR. Got to leave everything open for him sort of limits me in what I can do. I went thru the upholstery box yesterday for the first time, and saw it was all there and pretty. I had been worried about a CO detector for some time, lots of opinions there. This one is a household one, low cost, very sensitive, and very LOUD! Plus it has a flashing red light in case you went deaf. I think it will do very well, and also serve as a "canopy open and unlatched" warning beeper/flasher when getting from the hangar to the active runway.