Got help from Bob and John today. Leveled the plane and performed some of the AHRS calibration and other settings. All that passed. Got the battery installed so we could keep the system alive without a power supply. This was cool, because it's the first time the plane is powered without a cord. We pushed it into a nearby dirt lot because there could not be any ferrous material near the magnetometer for calibration. I was seated inside, while they guys rotated the plane clockwise at the prescribed levels, with a periodic hold. The Garmin System instructs all and makes this easy! Unfrotunatley, I kept getting a "leveling wings" error that could not be cleared. The fun part is when the guys pushed me back from the field while a stayed in the plane "flying". We checked all wiring...no errors. Software was all updated...still not good. We traded my AHRS with John's. They problems disappeared. Now we know I have a bad unit. Have contacted Garmin for a replacement.