Well, finally picked mine up from the post today. Most of the casings were not intact, but no sliced diaphragms or anything. QC on the other hand could use some improvement too...
One of the K47's has quite the noticeable "ripple" near the center termination, and two others have some backplate burrs poking out. Two of the "CK12's" have one little burr each as well, visible with the naked eye, but couldn't capture it in a photo.
How concerned should i be about those burrs, if at all? Sure, it points to lackluster QC, but would they affect the sound / signal in any (meaningful) way?
Although now i'm starting to wonder whether the creased one migh thus have more "vintage mojo"... [End of sarcasm - really sorry, couldn't help myself, making the best of a less-than-ideal situation]