Red Bull Racing Team Principal Christian Horner has said that the team was trying to find a solution for its mercurial and temperamental KERS problems.  This he said should ideally be done by the next Grand Prix at Istanbul, the Turkish GP in two weeks time.  The extra time he believed could be used for intensively looking at the problem and finding a solution to it.  He also defended the two stop strategy that was used for Sebastian Vettel at the Chinese GP in Shanghai yesterday, saying that for their team it was the most appropriate.  In the post race interviews Vettel had hinted that the two stop strategy may have not been ideal and that he should also have stopped three times like race winner Lewis Hamilton.