Is it best to enable the ATTI mode to fly, with the GPS switch on? Just thinking of this: I go up and have 20 satellites-all of a sudden there GONE- and don't return- total loss of satellites- with out them the quad wont RTH I think? But my app for ATTI was enabled- when i took off- so I put the switch into the ATTI position and fly back completely in manual- Good or not?