Dead impressive for sure, but I'm not entirely convinced that circling a pole at 40ish degreees of latitude constitutes "flying round the world". The mileage is nowhere near a true circumnavigation.
Far less impresive is that his support (publicity) team have such faulty geographic knowledge that they think he was near "Durbin" in S Africa. Oh dear. Are they American, by any chance?
All the same, the very best of luck to a plucky and tenacious adventurer.