Hi all I have had my Phantom for about 2 months and am generally delighted with it. But I have a couple of issues which someone may be able to help with. Living just over 5km from an airport and using firmware 3.06, I expected height limits to apply. When I start the Phantom the lights flash green 4-5 times, then briefly yellow and red, then repeat the cycle. Moving further from the airport I can get all green lights to remain on usually. Is this part of an undocumented feature to warn that you are within a restricted flight zone? Also I have trouble getting the values on the Tools page in the Flight Assistant to come within acceptable limits - the Z coordinate has always been very high while the X and Y are sometime high. I have regularly done the standard compass calibration (rotating the phantom etc), and have tried basic and advanced calibration in the Assistant without any improvement. Image of Tools settings: Is this difficulty with the compass related to my proximity to an airport? I can get noticeable drifting (especially on a windy day) while in a restricted flight zone. Thanks for your help.