The amount of vanilla has more to do with subjective tastes than the OG of the beer. What I do is split the bean lengthwise and scrape out all the "gunk" in the middle. Chop the pod into 2-3 in. long pieces and put the pod and "gunk" into secondary and rack the beer on top. I've tried soaking in vodka and didn't care for the taste, nor did I find it necessary in terms of sanitation.Denny, why do you scrape it out?