Listening for first crack on a popcorn popper
The cheap air popper is still the best teacher I have had. Here is how I time development after first crack, and why I stopped trusting the colour alone.
How long to rest beans before brewing
A month of brewing the same Ethiopian lot on days 1, 3, 5, 7 and 10 after roasting. The short answer: longer than I thought for espresso, shorter for filter.
Storing green coffee through a damp winter
Grain bags, a cheap hygrometer and a cupboard away from the kettle. What worked and what went musty.