As a point of observation, once anyone has become the registered owner of an aircraft or a company director, the given address is in the public domain. If you know where to look, the information can be found very quickly. In my view, it was "bad form" to publish the letters where the address was readable. It did not however reveal any personal details that cannot be found by other means.
There are a few snippets on YouTube which tell the story. One thing that I find puzzling is that the "camera operator" in the front cockpit does not appear to be filming key events such as the celebrated arrival in Australia. If any portion of the flight was to be filmed from the front seat then surely it would be the arrival and reception to mark the completion of the epic "solo" endeavour. Has anyone seen a picture of the "camera operator" at work ?