@NorthRiver I always try a range of roasts on new coffees. My most recent Kenyan does seem to do best darker than last year's. I'm going a bit past 2nd crack just to bring up a little more intensity of flavor compared to what I was getting on light roasts with this one. That said, not all Kenyan coffees are the same. If the only issue is a bit of underdevelopment you can bring the end temp up a couple more degrees or stretch development time out a little more.
There's a relatively small group of people who, if you've taken a coffee roasting class anywhere in the past few years, one or more of us have probably been directly or indirectly involved in developing content for that. Coffee enthusiasts are unlikely to guess who they are, but it speaks to the quality of the work that it's been adopted so widely.
Author of Typica software for coffee roasters.