Kammala jumla mai zuwa: Forbes ya kasance memba na 'yan wasan gymnastics na maza na Australiya daga 1975 zuwa 1980 kuma a wannan lokacin ya wakilci Australia a gasar
1977 Summer Universiade a Sofia, Bulgaria, 1978 gasar cin kofin duniya na wasan motsa jiki a Strasbourg, Faransa, 1979 Summer Universiade a Mexico City da 1979 gasar cin kofin duniya na wasan motsa jiki a Fort Worth, Texas. A Wasannin Commonwealth na 1978 a Edmonton, Kanada, ya lashe lambar tagulla a gasar ƙungiya ta maza.