Oh thank. Also when we say a 4 gal partial boil, it's 4 gal water AND extract right? So in this case it would be for my 4.75 pot (18L) a partial boil of 4 gal (15L) made of 2L of extact and 13L of water, which make up 15L. Then I add my 4L and 9.8oz remaining at the end of the 60 minute boil...