Just tried a new bean (new to me anyway). Daterra Sweet Yellow Bourbon from Brazil source - Hasbean). Roasted in the Hottop about 15 seconds in to 2nd crack, and rested 3 days. I did this as a single origin the the espresso machine, very nice, sweet, caramel and nut flavours (smelt of marzipan in the roasted bean bag), and a very muted sweet acidity not unlike apple at the end. It had a lovely thick fluffy crema that stuck to the cup, see the photo, mmmmmm.
I have some Bugisu to try it with too.