I would have to agree with
@G259. I've never actually tried DB with 6 lbs of berries, since Costco in Canada sells the triple berry in 2 kg bags (4.4 lbs), I use 2 of them. I also use 32 oz ReaLemon (half), so 16 oz ReaLime (1/3) sounds right. It seems to me cranberries may be acidic too, but I can't vouch for that. I don't think too much fruit would disappoint you, but too little might. You can always adjust your next batch if you think it has ten
Let us know what you decide, and how it turns out!