I'm having my A/C into an avionics shop for a static system check later this month. I'm worried that my Dynon D-180 might not be accurately reporting altitudes. The unit is over 12 years old and so wouldn't be under warranty anymore. Do any of you know if a D-180 fails a static system check, is there a calibration procedure that an avionics technician can do without removing the unit from the A/C? Or would I be forced to send the unit back to Dynon for repair? Or even worse, would such a failure basically mean that my best option would be to buy a new EFIS?