Peter - that is my father's design. It consists of a frame tgat opens out to make a platform that is supported by the spare wheel swing arms. Is is very stable.
The dome tent was custom made (it is narrower than a conventional dome) and the feet of the poles fit tightly into receivers in the frame, after which it is strapped down.
Whilst it is not my cup of tea (I prefer my Front Runner RTT), it is surprisingly easy to set up, and rock solid.
I think my father spent as much on this project as a good second hand RTT would have cost, but he is a pensioner. And I am glad that he stays busy. :)
Enjoyed many beers in Northern cape and have done thousands of kilometers there, but it's always good to see that very special place through someone else's eyes. Thanks for a very entertaining article