Hi Micheal, did you manage to resolve your [link|https://portafilter.net/portafilter-ultimate-guide/|Portafilter] issue? If not, which coffee machine do you have? I’m currently using a [link|https://portafilter.net/breville-bes870xl-barista-express-review/|Breville Barista Express] machine and haven’t encountered any issues. I did recently purchase a Joefrex pressure gauge just to check the pressure it’s producing which may be helpful in identifying your issue.