I have always dosed flat. If the bottom of the basket is roughly flat, the showerscreen is roughly flat, the tamper is roughly flat, and you want the water to flow evenly through the puck, then surely that puck should be even in density from edge to edge? I can't see how piling the coffee up like a mountain in the middle of the basket and then tamping it such that the centre has perhaps double the particle density than the edges is ever going to produce anything other than peripheral channelling. I never tried it, I just never even considered such a technique as it didn't make logical sense. But apparently lots of people have used this technique? Can someone enlighten me as to the rationale behind it? Greg
