I guess the only possible issue is fake original grip. I had encounter another grip that has all the engraving and serial number and looks exactly like my grip. But it feels significantly lighter than mine. Though I nvr go in depth to prove mine or the others is fake, I don't think there's such a big difference between the different batch of MB-D10. D7000 however, has been faked before and there's a well known video exposing it on Fstopper website.