I think someone here bought the biab one vessel system. I am thinking on buying it. I do have a question or two. First of all, how do you like it? Is it easy to clean? How do you keep the trub from going into the fermenter at the end of the boil? A hop stopper? Something else? Any problems? Are the High Gravity folks good to deal with? I am looking to buy the 240 V 20 gallon version.