I'm preparing to buy ingredients to brew the oatmeal stout recipe from Brewing Classic Styles. The recipe calls for 0.5lb of Crystal 80L, and I already have both Caramel 40L and Caramel 120L at home. If i mix these together, they average out to 80L. I'm sure there will be some different characteristics, but from what I read the high L caramel malts are suited for porters/stouts anyways, what do you think?