This may help you locate them - here are photos of the cracks on my car that Gareth took for the warranty work to be done.
FYI mine was checked as follows:
November 2012:
No cracks
June 2013:
No cracks
September 2013:
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Mike R
Sarcasm is just a free service I provide.
Nordschleife, there's only two barriers to worry about - the ones on the left and the ones on the right
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CSL number 044