Walter: I flew for an hour yesterday using my 720 with version 7.6 .22 and using the GPS signal from my SkyGuardTWX + AHRS. In level flight at altitude I still got two screaming terrain alert warnings (PULL UP!) caused by momentary GPS dropouts (the green track line went kerfluwie off the map). The SkyGuard TWX is supposed to have the most recent firmware update, too. Just thought you would like the feedback. ===Ralph