I want to make cider to keg in 18 lts kegs, i was thinking of making 13 and 1/2 lts at 10 % then when it finished adding 4and 1/2 lts of apple juice to sweeten it and bring it to about 7% . I have a Brewzilla can i put the 13and 1/2 lts in it and use it to pasteurize it then add the 4and 1/2...