Brawn: Hamilton criticism helps us understand what we have to focus on 11 February, 2013 Lewis Hamilton with Ross Brawn during the Jerez test Ross Brawn insists he has no problem with Lewis Hamilton’s criticisms of the new Mercedes, in the wake of an incident packed week of testing for the Silver Arrows at Jerez which saw the team’s new recruit crash due to apparent brake failure. Lewis Hamilton walks away from his crashed Mercedes After six years with McLaren, the 2008 world champion began work with his new team in southern Spain last week, and immediately both he and Nico Rosberg struck technical trouble. They had a much better second half of the opening test, but Briton Hamilton pointed out that the W04 lacks the downforce of his 2012 McLaren. “We have some work to do but it doesn’t feel like a disaster,” he said. Team boss Brawn insists he is not worried Hamilton is being forthright, “It is correct that he gives his reference points and helps us understand what we have to focus on. Some of it we knew already and that is why we restructured the aero group. I welcome that approach.” Lewis Hamilton Mercedes W04 “It needs to be positive and constructive but criticism of the right sort is helpful to a team, it drives you forward,” added Brawn. Meanwhile, the Mirror reports that Hamilton’s management team has undergone yet another change. Just one season into his collaboration with Mika Hakkinen’s former manager Didier Coton, Hamilton has now replaced him with Tom Shine. 28-year-old Hamilton is, however, staying with Simon Fuller’s XIX Management firm. “Tom is very experienced but Simon Fuller will still be the main man,” a source said. “It was Lewis’ decision. He has made all the decisions and Didier was on a one-year contract.” Content on GrandPrix247.com by: staff & contributors, Reuters syndication, GMM service, Getty Images, Formula 1 teams, sponsors & organisations.