Sat and Sun I tried one notch coarser on the grinder and there was no channeling on the pours.
Single and double baskets always pour differently of course, but the double was a little fast on what was a fairly hard tamp, so next time I will tamp even harder and see if I can slow the flow a little.
I guess I am now into that tricky territory where too hard a tamp builds up water pressure, perhaps predisposing it to channel, and too light produces a tendency to flow too quick with consequent poor extraction.
The quality of both shots were good so I might be within a whisker of the right combination. Who'd have an automatic machine!
Single and double baskets always pour differently of course, but the double was a little fast on what was a fairly hard tamp, so next time I will tamp even harder and see if I can slow the flow a little.
I guess I am now into that tricky territory where too hard a tamp builds up water pressure, perhaps predisposing it to channel, and too light produces a tendency to flow too quick with consequent poor extraction.
The quality of both shots were good so I might be within a whisker of the right combination. Who'd have an automatic machine!

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