I a former RAAF fitter I work with told me the story about the Mi-24s. Apparently the aircraft carrying them was intercepted by 75 squadron Hornets and told to divert to Tindal " or else "
Elvis was the pilot. This was known by almost everyone at 75 SQN, including the blokes who saw Harold Holt serving Lord Lucan a cup of coffee in a cafe in Coffs Harbour back in 1983.