I used the FMF silencer instead of the AAEN silencer that matches my chamber because I read in one of your old posts that the AAEN silencers were causing pistons to seize.
I'll chop up the FMF silencer and replace the perforated tube with one of a larger internal diameter. Is there any size that you would recommend? I realise that you're not going to be able to say the exact size to achieve the peak power out of the chamber but what do you think would be a safe size to use?