I think you probably could, but the problem with anything other than light extract is that you don’t really know what’s in it. I don’t think I’d use carapils along with the C80, but it depends…what kind of beer is it?
I use it sometimes. It’s just another tool and sometimes you need it, sometimes you don’t. With your recipe, start off with the basics and compare it to what you’re going for. If you don’t get what you want, adjust one ingredient at a time and brew it again until you get where you’re going.