Are conical's designed for Primary fermentation? I can see it would be easier to catch the sediment and drain off the top of the sediment, but other than that what are the advantages of using one? Do most still rack into a glass carboy, or go right into the keg. Is it better just to use as single stage. I was thinking about buying one, but They are kind of expensive so I wanted to do a little research before I take the plunge.