The season three car , which features a clean sheet of paper design led by Xavier Mestelan , has so far been an improvement .
The one area which is still being perfected is its performance on the new Michelin tyres .
The season three car , which features a clean sheet of paper design led by Xavier Mestelan , has so far been an improvement , although the one area which is still being perfected is its performance on the new Michelin tyres .