Before my first flight I wanted to verify that the check engine light would light up if any of the engines sensors failed. In my test I found that it would NOT. I then used a 9v battery to confirm that the light worked and it did, exposing that I had the + and - wires reversed. I easily swapped them around and BINGO, it works. I walked around the airplane giving everything one last good look before tomorrows First flight! I'm very confident in the machine at this point and unless something majorly wrong is lurking under the surface undetected, then it should be a very uneventful flight. And if all the temps are in the green, I will be Ecstatic! Here we go!