I was thinking of making a blueberry wheat ale for my SWMBO, but was wondering if instead of adding blueberries by the pound...would it be feasible to add a concentrated blueberry juice when racking to the keg? I don't have to worry about the preservatives because I'll be force carb-ing in the keg, not bottle conditioning. Has anyone tried something like this? Or know if it's just a silly idea? It gets away from the all-natural aspect of homwbrew, but if it's cheaper and easier, I don't much care