Just curious, from the new manual pg 16,

SOURCE Sets the GPS source for the SVN display (GNAV1, GPS2, AUTO). The Dynon GPS-250 or GPS-2020 have higher accuracy than an ARINC GPS GNAV1 source.

How does the afs gps250 have higher accuracy than the Avidyne or Garmin ARINC Gnav1 ? Does the ARINC strip away something from the expensive gps?