For anybody who has done this before , I am in process of fermenting about 4 gallons of cider. I am thinking of backsweetening with the little cans of frozen concentrate and then doing the stovetop pasteurization process once they reach the right carbonation. Im looking to end up with a mildly sweet sparkling cider but overly sweet like some of the storebought types ( some of that stuff is just TOO sweet ). I am confused about how much of the frozen concentrate I should add. Anyone with experience doing this and can shed a little light on maybe a basic amount of the concentrate I might need ? Thanks