*SNIP*
Incidentally, some recipes sugest that you cook the beans in the soaking water. Don't. Throw away the soaking water and cook in fresh. This avoids the worst of the "anti-social" effects of bean eating, If you get my drift ;-)
Another thing we have argued about on DC in the past is the advice that salt should not be added until the beans are cooked as it hardens them. Personally I have found this to be correct but others dispute this.
It's important to remember that, like red kidney beans, black beans carry a toxin (Lectin, IIRC) They should always be boiled fast for 10 minutes when you first put them on to cook in order to destroy the toxicity. This is especially important if you are going to cook them in a slow cooker.
I know you didn't ask for all this extra advice but it sounded from your post that you might be a "bean virgin" so I thought I'd give you the benefit of my 40-odd years experience with cooking beans. I'll now sit back and wait for the ensuing arguments