I just checked my recipe and yes it was 2.5lbs of ginger. I have the recipe saved in promas and it have it entered as 40oz. I cannot find the original notes from when I made it, but I do rememberbuying two large hands of ginger and also using one small one I had at home. As for using a juicer, I just used a grater because I don't have a juicer. I just poured the cooled wort through a fine mesh strainer to get the "pulp" out.