Interesting about "back up on the hill".
It seems to me that in support of the Wright's claim of First we are expected to trust their witnesses, but not to trust witnesses to other claimed first flights.
The following video is a bit "off topic" (nice though!) and shows a high level of control with what I assume is not 3 Axis Control as we understand it for normal planes.
https://www.youtube.com/embed/L62faWn-sa8