Hi, yesterday I cleaned my track plates for the summer season, I had to find out unfortunately that the two rear 20 mm plates have cracks, one more, the other less. It is the screw-on variant of the company SCC. The front 15mm plates are impeccable. The plates are cs 3 years old,perhaps also four. Unfortunately did not have the bill any more. May such something happen? Before it was not so to be seen only after cleaning, According to workshop for I have contacted the plates were always attracted with the right torque,the master said he had at that time specially informed himself. Daniel