MELBOURNE, April 20 : Australia's long and often fruitful history of converting rugby league backs into Wallabies weapons may be set for another chapter with Zac Lomax the latest to press his case following an eye-catching start with Western Force. The tall and athletic 26-year-old became the latest National Rugby League player to switch to rugby union in March when he signed a two-year deal with Rugby Australia and the Force following a legal dispute with the Parramatta Eels. Force coach Simon