Interesting tip about start of flow and pump pressure
I was reading the “videos of espresso extractions” on home-barista, and it was suggested that by the time you see the first drops out of the machine, the pump should have “settled down”, ei. when the noise from the vibe pump stop being loud at the start of the pour.
If not, it could suggest that your grind could be a tad finer.
I’ll have to play around with that and see what effect this has.

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