Jacob,
If I could give a piece of advice, which is probably obvious but worth mentioning and based on my own recent experience and that of friends in similar situations where interviewing as a "known quantity". Don't act like it's a formality, even if it is. I had a friend who went into a very similar interview situation, treated it just a bit too casually and as a consequence wasn't taken seriously and got passed over. Be sincere, straightforward and confident and I think things will turn out well for you.