I didn't notice that mine is indeed hard plastic until you mentioned it now bro. All along I thought 'twas some kind of metal as well.
Take care of those well fitting plastic blocks Racio - the lcd-2 experience has been 100% from what i read except for these blocks and this is what Steve maybe experiencing. With metal molding (I bet you know more about this than me) I presume you get a one time hole that does not get bigger or smaller if the metal is good quality whereas with plastic it can tighten or loosen depending on use.
If yours are not cracking then i suspect you got a good one

Steve if your blocks are sub standard comments on headfi suggest that Audeze indeed do replace blocks upon customer request.
But I suggest if you are not getting a response to call them so at least they can begin the process of replacing the block or both blocks causing the issue.
I really must stop thinking about the lcd-2 and speak more about my HE6
