 Yeah, the vinegar will work even better than the molasses at killing it back, and that's one place where the 30% is probably okay to use. I normally don't recommend it because it's so strong. I recommend the 20% because it's registered with the EPA as an organic tool now. Yes. But for the use that you have, the 30% would work. To get rid of the stump, what you need to do is get a drill or get somebody to help you with it and drill.