All parts with date stamp 31 17 or newer are ok.
Gen 3 parts with an older date stamp are ok to use. Gen 1 & 2 parts with an older date stamp should not be used.
Gen 1 Batch Code Location - the batch code is located on the top face between the alignment lines, if this is not present or the code is lower than 31 17 the parts need to be returned.
Gen 3 Batch Code Location - the batch code is located between the two screws on the side of the clamp.