There is something to be said about vodka and stuff for cooking. I followed the recipe you gave last year for vanilla and I found out the your recipe will last 5-7 years. I did split the bean through the center and kept it in a dark cool place, and used 8 onces of the best Russian vodka money can buy.
I did it proper and have a great finished product.....
However you didn't mention what to do with the remaining vodka, so I decide to make a red curent/black current drinky after it sat over winter, added a little maple syrup, and I just drank the dang thing, just because it felt good.