Pictured in 1977 at Theebine School, is a two-horse spray outfit built by my dad’s cousin, Vic Wilson, around 1970. He owned nearly half of Devil’s Mountain at Sexton, via Gympie, Qld, which during this time period had a bad infestation of Nagoora Burr, and much of the mountain was only accessible by horse.

The necessity of eradicating the burr required an innovative solution which