Sulawesi is a great bean, but FWIW I think it is better in a Mocha Java type blend than as a SO.
I've found that roasting it with a normal-to-faster profile, and dropping it just before second crack works best, which is why it can be pre-roast blended so well with the likes of a 'hit-it-hard-with-the-heat' beans like Harrar or Sidamo.
As a SO this gives a smooth, thick, earthy flavour, minimal acidity with perhaps a hint of aniseed. Very pleasant as espresso – but not so much if you like zingy, fruity spros!
Goes quite well with Yirg too – try a 50/50 pre-roast blend