Ah, Peter, going back to your link, I find it fascinating. Everything from roasting to watches! Thanks for sharing.I hope this is not against the guidelines, but dave.gt pointed to this thread to me, and I had already written up on how I make hand roasted coffees...here is the link.
Not a medium format image, but here is a rather recent roast. Bolivian Bird Friendly Superior AA. About 8 mins to completion of drying phase from charge. 8 minutes further to first crack, and about 4 minutes of roast development to completion. The charge weight was about 180g, and final coffee weighed about 150g. I have been hand roasting for about 20 years, a bit longer than my medium format habit, so may have some tiny experience with it. I have been tempted with a more professional roaster, like the Hottop and run Artisan software, but so far have resisted.
View attachment 149473
I will be in touch, you have piqued my interest more than once about a number of things!