Christopher was invited to join Audi Team Phoenix in a 8 day "Your drive 2013" test event in the south of Spain. Monte Blanco.
From the 28th November to the 3rd December 2012 Audi invited 11 drivers, seeking 1 driver to secure a factory Audi spot for the 2013 Blancpain series + other events.
Attached below are several documents from the test days, in which Christopher was the fastest of all of them.
In order to get a deep look into professional factory team motorsport work, download the 30 page PDF file.