That was really interesting.
I saw the glider in the the museum when I lived in Italy.
Also knew an ex Italian paratrooper, dead now I am afraid, who had some fantastic photo's of it from his days in the service. Well, if not this one then of the same model. He claimed to hate it as he had to jump from it, but he still had the photo's prominently displayed in his home in Treviso.
Having said that, I still did not recognise the challenge.