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@Jonny69
Slightly annoyingly, I think the OPV on my Gaggia is stuck ie not letting off at pressure. I got my kilo of Ethiopian LFGSS Special from @StevePeel , grind looks about right but it’s quite a dry, light roast so it was rushing through too quickly. I thought I’d take the opportunity to back the pressure off a bit, as is popular with today’s lighter roasts, but it’s made no difference even with -1 turn on the OPV which would equate to about ~8 bar. I should see that. I think next step might have to be a cheap pressure gauge to check what’s going on. Any other ideas?