Heikki Kovalainen has explained that Caterham’s CT03 chassis is more challenging to drive than its predecessor, with the former Grand Prix winner experiencing a "knife edge" balance throughout the opening practice session for the Bahrain Grand Prix. The Finn, who has returned to the team as a reserve, tested the original car en route to 20th place, while Charles Pic went half a second quicker with a range of upgrades. "Straight away, the feeling with the car was that there isn't any margin for error through a corner when you lean on it. It's on a knife edge," explained Kovalainen. "It's more unbalanced than I experienced last year. It's more difficult to drive and...
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