The GTX328 is a 327 but with Mode S so it has all the aircraft data programmed which it transmits to ground stations. It can’t, however, do ADS-B out. Is it compatible with the GDL82 or is its internal data going to conflict with the data loaded into the GDL? Or would I need to wipe its internal data (basically turning it back into a Mode C) and let the GDL do all the data side of things?