Metric Coffee · Colombia Carlos Efrain Cortes

{"summary":"First shot on the Colombia Carlos Efrain Cortes — a light washed single origin — and it blew through in 16 seconds with 51g yield. Flow was visibly fast, body came out watery and light, though taste landed at balance 4 with some lingering brightness. The numbers confirm severe under-extraction; the surprisingly decent balance reading is likely the bean's natural character masking how thin the extraction actually is.", "numbers":"Time of 16s is Very Fast — well below the 25–35s Normal range. Yield of 51.1g on 17.5g dose is a Long pull ratio (2.92). You missed your Espresso target on both dimensions — 16.1g over target yield and well outside the 25–30s time window. Your own notes confirm it: fast flow, watery body, lingering acid and bitter. The balance 4 is the outlier here — that's the bean being naturally expressive, not a sign the extraction was adequate. Lingering acidity and thin body at 16s is under-extraction regardless of the headline balance number.", "recommendation":{"action":"Drop grind to 33–34 and pull again. Keep dose at 17.5g, target yield 35–38g.","reason":"This is shot 1 on a light washed single origin at 2015m elevation — same density profile as the Coffee Lab Huila Decaf that choked at settings below 38. Non-decaf light roasts are even denser. Grind 40 (your Unicorn Blood setting on a medium-dark) was always going to run extremely fast here. Grind 33–34 is a reasonable starting bracket based on your history with light roasts — be prepared to go significantly finer if it's still fast. At 16s you have a lot of room."}, "bean_context":"Metric Colombia Carlos Efrain Cortes is a light washed single origin from Nariño at 2015m — high-density, slow-extracting, and at 11 days off roast it's sitting right in the peak window for a light wash (window typically 14–42 days). Wait — 11 days puts it just at the edge of the too-fresh zone for a light roast; peak doesn't really begin until around day 14. The freshness_status in the app says Peak but this bean may benefit from another 3–4 days of rest before it's truly ready. Flavor notes are Limoncello, Blackberry, Cocoa — the brightness you're already tasting is very much on-profile. Don't chase that acidity away; target extraction, not balance suppression.", "progress_note":"Shot 79 and first pull on a new bean — the fast shot is completely expected given the grind transfer from Unicorn Blood. No patterns to read yet on this bag.", "overall_verdict":"needs_work", "is_stable":false, "updated_coaching_state":{"experience_level":"beginner","current_focus":"Metric Colombia Carlos Efrain Cortes — light washed single origin, first shot. Grind 40 ran 16s Very Fast, 51g yield. Starting adjustment: grind 33–34, dose 17.5g, target 35–38g yield. Bean may be slightly too fresh (11 days, light roast peak starts ~14 days) — consider resting 3–4 more days if extraction remains difficult.","known_patterns":"Acidity sensitive. Bambino drip lag 6–10g on this setup — normal. WDT solid. 30lb spring established. Maomi dialed in at 32.5 for reference. Decaf extracts more easily than regular beans — start 1–2 clicks finer than equivalent regular bean grind. Left spout dropout on decaf shot 1 was loose puck from coarse grind — resolved at 29. Short yields were driving lingering sourness — fixed at 36–37g. Grind 28 on Ándale causes fast shots with channeling signs and under-extraction — confirmed twice on bag 1/early bag 2. Grind 29 on Ándale had cleaner flow. Grind 33 on Ándale bag 1 produced best results (31s, balance 2, good with milk). On Decaf Huila (Metric): grind 28 confirmed dialed in — 27s, balance 3, 4 stars, best shot on the bag. Grind 28 also produced a regression (25s, balance 2, 41g yield) — yield control is critical. Quick-fading acidity at balance 2–3 is bean character on this bright EA Washed decaf, not an extraction fault. Lingering sourness is a real extraction flag. Stirring espresso before tasting reveals truer flavor — surface layer reads sour on bright beans even when extraction is solid. Late bilateral drip near end of pull is puck breakdown artifact, not channeling. Brazil Cerrado (natural process) choked or ran 60s at ALL settings from 28–41 confirmed — this bean requires dramatically coarser grind than any previous bean. Do not attempt any setting below 41.5. Grind 45 ran 15s Very Fast. Grind 42 = 28–32s Normal, balance 3–4, confirmed dialed in across three shots. Asymmetric flow (one spout only mid-shot) on Cerrado traces to uneven WDT distribution, not grind — resolved by end of shot with no major taste impact. Ándale Market bag 2 behaving differently from bag 1 — bag 1 dialed in at grind 33, bag 2 dialed in at grind 28. Do not assume prior dialed-in grind applies across bags. Ándale bag 2: four consecutive channeling shots (grind 31–29.5) with alternating spout restriction — confirmed WDT/puck prep issue. Slowing WDT to 45s with deliberate edge-to-center coverage resolved channeling. Grind 28 + 18g dose + 37–41g yield = balance 4, 4 stars, confirmed dialed in on Ándale bag 2. Coffee Lab Huila Decaf (light roast, unspecified process): choked at every setting 27.5–33 across 5 shots. Light roast density is dominant factor — do not assume decaf processing offsets it. Grind 38 is first working setting — 35s Normal, balance 3, lingering brightness, channeling still present. Alternating spout restriction at 38 traces to puck prep, not grind. Do not go coarser until WDT fix is tested. Dark Matter Unicorn Blood (medium-dark, washed, Honduras/Guatemala): grind 34–37.5 all ran slow (39–60s) with mid-shot single-spout dropout — consistent partial channel pattern. Over-agitation during WDT confirmed as recurring channel mechanism. Grind 40 + 17–17.7g dose + standard yield = balance 3–5, confirmed dialed in. Hard cap WDT at 30 seconds — count it out loud. Quick-resolving acidity/bitterness at balance 3–5 is bean character, not extraction fault. Even bilateral flow is now consistent since locking WDT discipline. Bambino 7g lag is material when chasing short/ristretto pulls — stop pump 7g before target cup yield. Ristretto on Unicorn Blood: 24–28g yield, grind 40, lag compensation reliable — two 5-star shots confirmed in one session. Right-spout flutter in afternoon ristretto (shot 77) linked to uneven WDT edge coverage — same puck prep pattern as earlier regressions. WDT right-side edge coverage is the active variable to monitor. Metric Colombia Carlos Efrain Cortes (light washed, Nariño, 2015m): grind 40 ran 16s Very Fast at 51g — way too coarse. Light roast density requires significantly finer grind than medium-dark beans. Starting bracket: 33–34. May be slightly too fresh at 11 days (light roast peak ~14 days).","last_recommendation":"Metric Colombia Carlos Efrain Cortes: grind 40 ran 16s Very Fast. Drop to grind 33–34, dose 17.5g, target 35–38g yield. Consider resting bean 3–4 more days if extraction remains difficult.","last_analysis_date":"2026-07-17T16:31:00.000Z","last_analyzed_shot_id":107,"bean_contexts":[{"bag_id":4,"name":"Printer's Row Coffee Co — Brazil Cerrado","status":"dialed_in","dialed_in_grind":42,"dialed_in_yield_g":38,"current_grind":42,"shots_pulled":10,"profile":"Natural process, Brazil Cerrado, baker's chocolate/dried apricot/walnut, low acidity","notes":"Dialed in: grind 42, 28–32s, balance 3–4. Slight sourness is bean character. Watch WDT evenness to prevent asymmetric flow."},{"bag_id":2,"name":"Luckycat — Maomi Blend","status":"dialing_in","dialed_in_grind":null,"dialed_in_yield_g":null,"current_grind":32.5,"shots_pulled":7,"profile":"Unspecified roast, PNG/Guatemala/Mexico blend, full body, caramel/cocoa/nuts, low acidity","notes":"Sweet spot bracketed: 31=bitter, 32=sour, 32.5=balance 3 (slight linger). Try 32.5 at 33g yield next to close the gap."},{"bag_id":3,"name":"Metric — Decaf Huila Pink Bourbon","status":"dialing_in","dialed_in_grind":28,"dialed_in_yield_g":37,"current_grind":28,"shots_pulled":9,"profile":"EA Washed decaf, Colombia Huila, Pink Bourbon, ganache/orange peel/Luxardo, high elevation","notes":"Best: grind 28, 27s, 37g, balance 3, 4 stars. Regression at 41g yield — yield control critical. Try 27.5 next."},{"bag_id":5,"name":"Metric — Ándale Market (bag 2)","status":"dialed_in","dialed_in_grind":28,"dialed_in_yield_g":38.5,"current_grind":28,"shots_pulled":9,"profile":"Medium roast, Mexico/Guatemala blend, bright/acidic, cherry/nougat/wildflower honey","notes":"Dialed in: grind 28, 18g dose, 37–41g yield, balance 4, 4 stars. Channeling at 29.5–31 was WDT inconsistency — resolved with slower deliberate WDT."},{"bag_id":6,"name":"Coffee Lab & Roasters — Huila Decaf","status":"dialing_in","dialed_in_grind":null,"dialed_in_yield_g":null,"current_grind":38,"shots_pulled":6,"profile":"Light roast decaf, Colombia Huila, unspecified process, bright/sweet/lemon","notes":"Choked at all settings 27.5–33. Grind 38 first working shot — 35s, balance 3, channeling still present. Light roast density dominant. Fix WDT before adjusting grind."},{"bag_id":7,"name":"Dark Matter Coffee — Unicorn Blood Espresso Blend","status":"dialed_in","dialed_in_grind":40,"dialed_in_yield_g":38,"current_grind":40,"shots_pulled":12,"profile":"Medium-dark washed, Honduras/Guatemala, dark chocolate/caramel/berry","notes":"Dialed in: grind 40, 17.4g dose, 36–40g standard / 24–28g ristretto. Hard cap WDT 30s. Stop pump 7g early for lag. Right-side edge coverage in WDT is active variable — uneven pass causes spout flutter."},{"bag_id":1,"name":"Metric — Ándale Market","status":"finished","dialed_in_grind":null,"dialed_in_yield_g":null,"current_grind":null,"shots_pulled":12,"profile":"Medium roast, Latin American blend, bright and acidic, cherry/nougat/wildflower","notes":"Best result bag 1: grind 33, 31s, balance