There is a small country in Africa with only two controlled airports. A friend from there is now with me and while flying with me discovered Skydemon. He owns three aircraft over there, on of them a SET. Obviously nobody from there is going to subscribe since there is no coverage and Skydemon is not going to code since there are no subscriptions from over there. What would it take to get the ball rolling?

DirDej,

The missing terrain seems the most serious trouble. SD team could help maybe.
I would continue with airspace file with WGS coordinates from cameroon_stateborder.kml (notepad). Then put important towns into waypoints file - also with a text editor.

PS:
Obviously there are better tools then notepad and copy-paste. (The source kml has around 30,000 points...) Find enclosed the airspace file (accuracy 500 m, 995 points in total - due to tablets) created from kml sent to you recently: The cost line is manually edited, the point density reduced by GIS software.