Hello everyone, I've heard there is an altitude governor that prevents the Phantom 3 from flying over 500m. I live in Utah where there are many mountains with steep cliffs. I could have the Phantom fly up a mountain with elevation of a couple hundred feet but am worried if I fly slightly one direction and the Phantom read it is then at a 1000m elevation and tried to return to home. And experience with flying around high cliffs and how that affects the return to home feature and the elevation readings? I want to be able to navigate some of the steep valleys from the bottom or the tip of the valley. No fly air space. Not national park. Just steep ravines between mountains with lots of space. Thanks.