For the medium roast (4°F hotter than start of 2nd crack for end temperature), I really stretched time while the coffee is yellow to push the sweetness and the result is that even just smelling the brewed coffee you might think someone added honey to it. The rate of temperature change consistently and slightly increases throughout the roast and the result is nicely balanced.
The dark roast uses a traditional S curve, often a good place to start for dark roasts as it hits the balance of producing flavors that only develop at darker roasts without completely destroying the pleasant flavors developed earlier in the roast. Especially as the coffee cools it's a medium-heavy bodied coffee with good sweetness and clove spice. A bit of smokiness on the first sip that diminishes as the coffee cools.
To use as an example in the book, I took the latest coffee from Sulawesi which so impressed me during the initial exploratory roast and developed roasting plans not only for the dark roast version that I intend to sell, but also a medium and light roast version so I could write about the process from those different perspectives with the same coffee.
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Author of Typica software for coffee roasters.