Has any of you done an altimeter calibration with the latest software? We tested mine yesterday and GSU 2 did not pass at the lower altitude so we recalibrated both to get them perfect. Trouble is neither one would save the calibration. Garmin says they need to replace the GSU’s but to me it is a saving issue in the software. All my equipment is new. My set up is 3-G3x touch screens with 2 GSU and a G5. I have been down for the winter building the New panel so hopefully they will send me new ones before I send mine back to avoid down time if that is the route we need to go. If we know others have done the calibration with the latest software I can rule that out.