Sample Roast 3 was a 56 g washed Colombia micro-batch that landed at 14.6% weight loss with 1:22 development after the first-crack button press. A temporary gasket fix reduced aroma leakage, and an overheat protection event introduced airflow changes mid-roast. The key learning is not “did I mishear crack,” but that hardware/airflow changes can shift…

Why this comparison exists These two roasts were not about flavour discovery. They were a controlled check: Does the Gene Café CBR-301 behave like itself when the batch size is reduced to ~52g? One roast started cold.One roast started warm.Both were set to 250°C. This Note documents what actually happened. Measured Data (Side by Side)…

Why this roast exists This was a second ~52g sample roast to continue the small-batch consistency experiment — but this one was started intentionally on a warm machine to see what changes (and what doesn’t). Coffee Setup (what I actually did) Measured results (from the roast log) What I observed during the roast (notes, not…

Why this roast exists This was a ~52g sample roast done as part of validating whether the Gene Café CBR-301 behaves consistently at very small batch sizes. Coffee Setup (what I actually did) Measured results (from the roast log) What I observed during the roast (notes, not claims) Interpretation (kept deliberately modest) What I’ll do…