Columbia supremo profile

I roasted few times columbia supremo and i didnt got good results… Or its grasy or is flat…
This is my last roast… When i test it its flat, no body only little acidity.

Im looking for sweet full body columbia supremo roast.

Suggest taking a look at this thread Advise on 1kg espresso roast for some idea.

I read it already.
So somone have experience roasting columbia supremo?