Beringer indicates a couple of Service Bulletins. SB-0250 Backstop Replacement indicates the need to replace the backstop plate from serial 335 to 370. However i am not able to locate the backstop plate serial number. i have only the Brake assembly serial number 7687 and 7685. I imagine the SB doesn't apply for my brakes, but i requested Beringer Support to confirm. BERINGER CONFIRMS THAT THIS SB IS NOT RELEVANT. (Dear Paolo, only EA-003 are impacted by SB-025. You own a EA-003.3, so you are not concerned by this Service Bulletin). SB-028 indicates that my backplate could have misalignment in the retention pins causing scratches to the wheel. Need to apply this SB