I neglected to request BMW to separate out the Maris-Otter

I ended up using 1 gallon of "soured" Guinness. I like the sourness I achieved, and hope to be able to produce a more exacting version of your recipe within the next few months. Thank you very much for putting this out there -- I like the flavor I achieved much more than my buddy's Xingu clone (Sweet v. Sour, Sour FTW!).