Something is wrong with this recipe. I put it into BeerSmith 3 and I am only getting an SRM in the low 20s even with darkest chocolate malt at 500 L. The amounts of Carafa Special III and Black malt are not enough to add much color, and perhaps not much flavor, either. Scaled to a 5 gallon batch, they are about 1 oz of Carafa Special III and 0.5 oz of Black malt. I suspect that those quantities should be higher.