I have had occasion that required me to get my Mavic Pro home in ATTI mode after a loss of signal...and it's been a harrowing experience that, only with a lot of luck, I've managed NOT to crash/lose my drone. I came into the drone-world with NO flying experience whatsoever, unlike many of y'all who learned to fly (at great expense in many cases) without all the electronic "nannies" that actually do most of the flying now. I recently heard that it is possible to modify parameters that would enable my Mavic Pro to start and remain in ATTI mode so that I would be able to practice ATTI mode flying. I have a location with a VERY large field where I could practice with little likelihood of flying HORIZONTALLY into any obstacles. Anybody know how to hack our beloved Mavic Pro parameters in such a way that I can start in ATTI and quickly switch to GPS when I wanted?