Kenya, Thunguri

This is a technically demanding brew. The grind is 400μm — 95μm finer than a standard V60 recipe — because SL-28 and SL-34 at light roast resist extraction in a way that medium-roast Colombian or Brazilian does not. Light roast leaves more intact cell structure and higher CGA content; the bean effectively has more locked inside it that needs fine grinding and sufficient temperature to access. The 91°C target sits in the right zone: high enough to push past the CGA bitterness threshold and access the citric and phosphoric acids that define Kenyan flavor, but the -3°C from default temperature specifically protects the anaerobic natural process's fermentation volatiles, which degrade faster than standard natural-process compounds. With a plastic V60, slurry temperatures will stay closest to your kettle temp — ceramic drops the effective extraction zone meaningfully at these parameters.

The Kalita Wave's flat-bottom geometry and even flow distribution make it a strong choice for this bean's challenge: extracting SL-28/SL-34 at light roast requires prolonged, even water contact to push through the initial acidic phase into the aromatic complexity where apple, blood orange, and brown sugar live. Conical drippers like the V60 produce some bypass — water channels around the edges — which is fine for more soluble coffees but costs extraction efficiency on light roast high-density Kenyan. The flat bed minimizes this, which explains why the Wave achieves 88/100 compared to V60's 89/100 despite being a slightly less precise brewer overall. Grind lands at 430μm, the temperature holds at 91°C, and the 100μm deficit from default remains — the same physics apply across all paper pourover methods for this bean.

The AeroPress temperature delta reverses here compared to other brew methods: it lands at 91°C because light-roast anaerobic Kenyan coffee demands higher extraction temperatures, which is a full +6°C from the AeroPress default. Standard AeroPress theory calls for lower temperatures (around 185°F/85°C), but SL-28/SL-34 at light roast is the exception. These varieties need higher heat to extract properly — the intense blackcurrant and fruit acidity of Kenyan SL coffees comes from complete dissolution of the aromatic compounds, not early-extraction acids. The grind drops 100μm to 300μm — finer than you'd typically use for AeroPress — precisely because the target is pushing through dense light-roast cell walls in the 1-2 minute window available. Use a paper AeroPress filter to maintain oil-free fruit clarity from the anaerobic natural processing.

The Clever Dripper's full immersion phase is particularly valuable for light-roast high-density SL-28/SL-34. Because the grounds are submerged for the full steep period, you're not relying on water-flow evenness to achieve extraction — every particle is in contact with water for the entire 3-4 minutes. That reduces the bypass problem that affects conical pour-overs on this dense bean. Temperature holds at 91°C, grind is 430μm (same as the Wave), and the Kenyan-specific rules push toward a slightly higher ratio than filter defaults. The paper filter on drain protects against the anaerobic natural oils that a metal filter would pass. If the cup tastes both sour and thin simultaneously — which is possible with uneven extraction — the Clever's immersion consistency makes it easier to diagnose: it's almost always a grind issue rather than a pour-technique issue.

The 70/100 match reflects genuine tension: light roast + anaerobic natural + SL-28/SL-34 are individually challenging for espresso, and here they compound. The grind drops 100μm to 150μm — the largest grind reduction for this bean — because light roast requires extra surface area and the SL-28/SL-34 varieties' exceptional density resists extraction at espresso's short contact time. Temperature rises to 91°C, which is high for espresso but necessary to push through intact CGAs. Light-roast espresso calls for longer ratios and preinfusion: the recipe targets 1:1.9-2.9 output, longer than a traditional Italian pull. Expect bright, blood-orange-forward shots that are acidic by design. Sour is the dominant failure mode (score:60) — any grind error toward coarse produces aggressive acidity that has nowhere to hide at espresso concentration.

The 41/100 match is a direct consequence of stacking four unfavorable conditions: light roast (low extraction efficiency), anaerobic natural processing (oil-heavy), SL-28/SL-34 (density-resistant), and Kenyan high-altitude density (maximum extraction difficulty). The moka pot's steam pressure and metal filter pass all the fermentation oils into the cup, where they compete with — and largely obscure — the apple and blood orange clarity that defines this bean. Temperature drops aggressively to 91°C in the pre-boiled water to compensate. Metal mesh with a light-roast natural coffee creates this exact conflict: SL-28/SL-34 light roast's fruit clarity requires paper filtration to be legible. If this is the only available method, the recipe will produce a concentrated, oil-forward Kenyan — aromatic but less defined than a pourover would deliver.

The 37/100 match is the second-lowest on the ranking, and for the same reasons as the moka pot: metal filtration and light roast anaerobic natural are a bad combination for SL-28/SL-34's defining quality. The metal mesh lets the fermentation oils from the anaerobic natural process directly into the cup, where they add body but mask the precise fruit acid profile — the apple-malic and blood orange-citric character that makes Kenyan SL-28 coffee among the most celebrated in specialty. Temperature is adjusted to 91°C. Grind drops 100μm to 900μm — still coarse for French press, but finer than default to compensate for the light roast's extraction resistance. Hoffmann's technique applies: steep 4 minutes, then wait an additional 5-8 minutes undisturbed before serving to let grounds settle, which reduces sediment-driven bitterness.