Nice job on the video by the way. How did you get the childrens laughter at the end? Did you record it on a separate recorder & add it in while editing?
If your Hero has the latest firmware update it has a new linear mode that does a pretty good job of removing the curvature effect. No need to fix in post....
But the phone & controller still need to be together right? If I understand correctly ... the phone/tablet connects to the controller & the controller connects to the Solo. Please correct me if I'm wrong...
If you could pick only 1 of these tools, which one would you pick? I can see the value of having one or the other, but personally I don't need both, since they seem pretty similar in function.