LAUGHS are big business for radio power duo Dave Hughes and Kate Langbroek, who have moved their dial from KIIS FM to the national drive shift at the Hit Network. After being caught in the public relations crossfire following the announcement of their network defection in October, the pair are focusing on fun rather than radio politics. “Obviously they (KIIS) would have wanted us to stay on because it was part of their vision, but for us when that opportunity (at Hit) came up, which initially we said no to, it just became a question of ‘why are we saying no?’