Rudd visits Labor's 2nd most marginal seat PRIME Minister Kevin Rudd has checked out a giant hole in Melbourne, which will become a future swimming pool. Mr Rudd was campaigning in Labor's second most marginal seat of Deakin, held by Mike Symons on a margin of 0.6 per cent, on day 31 of the federal election campaign. There, the prime minister visited a construction site for an aquatic centre at Ringwood. The Labor government has pledged $10 million to the project. Ethan Newnham, 10, told Mr Rudd about his diving skills and how hard he's training. "I'm diving head first from five metres," he said. Mr Rudd said he hoped Ethan made it to the Olympics one day. "No pressure mate, we expect Olympic diver and at least a bronze medal," he said. Mr Rudd will later on Tuesday inspect the Corning Cabling Systems factory in Clayton, in the safe Labor seat of Hotham being vacated by Simon Crean. Corning makes the fibre optic cables being used in the high-speed National Broadband Network (NBN) roll-out. Labor is playing up the benefits of its $37 billion NBN project, saying it will transform the economy and improve national competitiveness. A report commissioned by the government says the average household will be $3800 better off a year by 2020 under the benefits provided by the NBN, in its current form. "Many of the benefits will emerge gradually, as consumers find price discounts and variety online, as more employees are allowed to telework, and as people get more accustomed to accessing services online," the report by Deloittee Access Economics says.