manticle
Standing up for the Aussie Bottler
If he added the fruit at a later stage the fruit sugars will feed the bugs primarily, resulting in increased acidity, however the grapefruit also has a large amount of acids present naturally, once the sugar is gone, this acidity will become a lot more evident. I think manticle's biggest problem will be making this one not too acidic.
I definitely agree with kabooby, keep it simple, make the base beer first, then add the fruit later(or do half with / half without). There are so many variables in these beers and so much complexity already, the biggest thing you have to do is wait.
My 2 cents would be to increase the gravity of the brew a whisker (maybe to 1.055-1.065), as this will prevent the souring occurring too much and will also give it more aging potential, you'll still get heaps of brett character though.
Cheers
Q
I am ordering 2 packs of roselare. I'm very keen on the sour citrus idea and don't want to have to wait 2 years before ttrying but you guys have got me convinced that I might be best making two brews - one with and one without. I'll look at beefing it up gravity and body wise too.