Standard cooling on the Gene is very poor. Youve got a hot chamber full of beans sitting at 200+ degrees C and theyre expected to cool by simply blowing air through the heated chamber? As noted it took 12 minutes to drop the atmospheric temperature from 228C to 60C. Obviously its a compromise Genesis had to make to get the design they were after but if you use factory cooling you really need to stop the roast a couple of minutes before you want it to finish which is a bit of a guessing game. Alternatively use the emergency stop feature (as we did for the last two tests) which allows you to pull the chamber out and dump the hot beans into colanders or something for external cooling. Works a lot better and a lot faster.
The Hottop by comparison does a great job. As soon as youve finished the roast you hit the Dump button and within 20 seconds all the beans are out and being fan-cooled and agitated. They were noticeably cool within a minute or two and just warm to the touch within five minutes.