Two brothers who quit their shopfitting careers to become professional greyhound trainers could win their first Category One competition at Central Park Stadium on Saturday night. Chris and Phil Hamblin transformed their warehouse near Reading from a fitting unit into purpose-built kennels, complete with paddock space, a swimming pool, kitchen and a racing office. Two years on from their career change, the pair are now one of six finalists in the £12,500 Arena Racing Company Cesarewitch Grand Final at the Sittingbourne venue with Ela Maestro. The two-year-old dog by Droopys Sydney won his roun…