I am brewing a Belgian Dubbel in a couple of days and the recipe I have calls for Hallertauer Hersbrucker hops for finishing and Tradition hops for bittering. I will definitely buy some hersbrucker hops for the aroma and flavor, however I have a bunch of Centennial hops sitting in my freezer that I want to use. Do you all think I could substitute the Centennials for the Tradition hops for bittering? Tradition hops sit around 6% alpha acid, where the Centennials sit around 10%, so I think I'd be okay if I just scaled back the amount of Centennials to achieve the same IBU level, right? I've not really done much in the way of substitution yet, but it seems that bittering hops do not impart a whole lot of flavor, just bitterness, so it seems like it'd be fine to substitute other hops and achieve a similar profile. Any advice that the community could offer would be greatly appreciated.