All Overground Stations in the Fastest Time

Time for another 'all stations' challenge - this time, to visit the 112 stations on the London Overground. Can I do it in the fastest time possible? The unofficial time to complete it is 9 hours and 7 minutes, by my reckoning i could do it in between 9-10 hours. So here's what happens when you spend a day on the #OrangeTrain network. The ExplorerTicket website which details the Top Times of the unofficial challenges is here: http://www.explorerticket.co.uk/tubechallenge/