Gregr wrote:That's too bad- I'd give up on it too.
I just roasted up a 227g batch of Burundi Sogestal Kirimiro. Write-up said it makes a great SO espresso so I snapped it up. No power drop during the drying phase and full power to *just* before first crack, hoping to retain a good amount of brightness and be sweet too with the medium long finish. Well, I misunderestimated first crack and it didn't come for a full 2 minutes after I lowered the power to 50%. I thought I stalled the roast but first crack finally arrived and it was lively enough. I did the stretch as planned- beans have a rough surface but are all very evenly colored. I will let them sit for 5 or 6 days and then make some hopefully tasty shots.
I have found that P5 slows things down quite nicely but have never seen it stall the roast. Leading into first crack, P5 is a great tool to either get a longer stretch for espresso or get a slower temp rise for a nice light roast. Let me know how that Burundi turns out. I have the same bean at City+ resting. I found that it took longer for it to finish drying and get to first crack than some of the other beans I have roasted recently. I finished drying right at 6min and hit first crack up around 10:05 with the roast ending around 12:45. The beans look great. Lots of surface texture like a high grown central.