I bet that cup cost you more than your machine and grinder put together. Pretty cool though.
^ drill it out? Messy but possibly doable if you're careful* - drill the head off, then once your remove the screen there should be thread you can grab with pliers and unscrew? Then you'd just need a new bolt...
don't jump in and do this, defo await others advice!
A week off coffee, ended with one of these from the classic yesterday, and again today:
I bet that cup cost you more than your machine and grinder put together. Pretty cool though.