When i was changing the pads to sz2000 from HA-M55x. I found out some screws showed sign of wear or use even though I bought them new. So didn't pay too much attention to it but now I got worried if they were refurbished or fake lol!!! So I contacted the seller for a return. Now, with all my settings tweaked on my C5 and viper can't tell the difference form ha-m55x sound and the sz2000 maybe because now I am all paranoid that they might be refurbished or something.. here are some pictures. would like to hear what do you think??