Hi folks - question... I've seen several people from colder weather areas talking about flying their Mavics from their cars. Just wondering how exactly that's done - can you actually close the door and not worry about magnetic interference? Was in Pittsburgh, PA over the weekend and it was 0 degrees F - my son and I lasted about 5 minutes outside, but if flying from inside a car is possible, it'd open up some possibilities. So, details, concerns? Thanks for any comments.