Originally posted by 13bob
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You want the tamped bed of coffee just below the shower screen, have a search for the 5 cent piece test. Basically you want the gap between coffee and shower screen to be thickness of the 5 cent piece. Once you have your ideal dose weight, it will generally only change within a couple of grams depending on the type of coffee its age and the grind.
Anyway the point is, once you have eliminated the dose weight variable, you can confidently adjust your grind finer or coarser to get the pour you want - CONSISTENTLY.
Obviously its not viable in a commercial situation, but as Dragunov said, in the home why not?

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