I did two roasts so I would end up with about 150-200g of beans.
I didnt have a stopwatch, a thermometer, or a funky vacuum powered bean cooler... But damn - It was fun!!!
Basing my timing off my (analogue) watch, both roasts took about 3-4 minutes to get to the start of first crack. And I pulled both at about 8-9 minutes when I *thought* I could hear some more cracking just starting. Cooled them between two metal pans under a fan.
The result looks pretty good to my untrained eyes - And they are now resting in a vacuum bag salvaged from my last bag of Mecca beans. Cant wait to test!!!