i have both a phantom 4 and inspire 1. I have been ask to fly inside a large (EMPTY) cathedral which I am really looking forward to. That said I have not flown indoors. My first question is I assume that I should be in atti mode? Also and I know this is a phantom forum, if anyone has experience with the inspire, I would love to hear your thoughts on the inspire 1 vs. phantom 4 for indoor flight. I am choosing the P4 just because I figure that it is smaller and a bit more nimble, but if I am off base with that assumption, let me know as it should would be nice to have the superior camera control and a second operator. Thanks in advance and please feel free to offer any other indoor fly tips you can think of. There doesn't seem to be a whole lot of pilots out there with a lot of indoor fly time.