I live in Kailua Kona and we've only had our Model X a couple of months. We have discovered that autopilot is always limited to 45. The speed limit is 55 going past the airport and towards Kainaliu. Even so, with the speed assist set to relative +5, shouldn't I be able to go up to 50 between Makalapua and the harbor? I'm wondering if this is a gps data issue or something else. Do other owners on the big island have this problem?