i made that recipe and left it in plastic bucket to secondary for 7 months it was really good but not what i would call quite sour. i used white labs 001 in primary if i had to do it again ide use the roeslare only i would have preferred a little more pucker
It really doesn't matter I would just toss the rosealare, I really doesn't taste good till about 24 months in a glass carboy. What I really mean is the recipe really doesn't matter as long as the color is right. All the flavor comes from the aging. If your planning to use a bucket make sure to suran wrap it to cut down the o2 getting in.