What does addng raisins do for flavor? When can they be added and how mcuh would one use for 1 gallon. Also curious im only 1.5 weeks in primary process... Can i let it go in primary for more than 2 wks despite the simple recipe said 2 wks then rack in secondary for another 2 wks. I was thinking of letting it go in primary for atleast 4 wks.