A lot determines how much "roasted" flavor you want. I would decrease the roasted barley to 0.5lb and add some chocolate malt at a 0.5lb or black patent at 0.5lb (if you wanted darker more dry roasted taste). The flaked barley could be cut back to 1.0lb and does give quite a bit of proteins to...
I ordered a "Inductor tank" from AgriSupply. Then put together a stand to hold the 15 gallon tank, the lid already has a hole that I had to work with to hold a airlock.