Metric · Ándale Market

Confirmation pull at grind 28 — but the data shows grind setting 28, not 29 as planned. Shot ran fast at 21 seconds with a 2.22 ratio, rated sour with lingering acidity and thin body. This is not the confirmation pull you intended.

Shot time of 21s is Fast by your labels and under-extracted by industry standard (target 25–35s). Ratio 2.22 is Normal — yield was fine at 39.8g. The fast time at grind 28 lines up exactly with what you saw last time at 28: channeling risk, faster flow, extraction problems. The lag_g reads 10g here, which is higher than your typical 6g Bambino drip lag — worth noting but not necessarily alarming. Flow description (high initial flow, strings thinning, wobbly finish) is consistent with a slightly loose puck or mild channeling at the coarser grind. Balance 2 (Sour) with lingering finish confirms under-extraction. The numbers and taste notes are fully aligned.

Ándale Market at 31 days post-roast is still in a good freshness window for a medium roast. However, this bean is naturally bright and acidic — cherry, wildflower honey — so some acidity impression is expected. The lingering sourness with thin body here is not bean character though; it's under-extraction caused by the grind being too coarse and the shot running too fast. A well-extracted shot on this bean should show brightness up front that cleans up quickly, not a sour finish that hangs around. The bean is not the problem — grind 28 is.

Your flow description is getting more precise — noting initial high flow, strings thinning, and wobbly finish shows you're reading the shot well in real time. That diagnostic skill is exactly what you need to catch future puck issues early.