YUP, heard the same thing at my shop about that peep. This story is not about the metapeep, butI changed my peep the other day, well Len did. I wanted it reamed out a little. When he took it off he showed me where the strings had cut through the outside covering of my generic peep and there was a sharp little metal burr digging on the string. I guess just lots of shots and wear and tear. So, we put on a new one. Would never have seen it myself probably and no one could seen it as long as it was on the string. It could have very easily cut through some string strands.