So I have no idea how much sugar is in any given bottle but I'm thinking probably not too much. Should I uncap and add a bit of sugar or is this just asking for bottle bombs? Alternatively should I risk a flat weissbier? Aargh

You are probably right. Thanks.MightyMouth wrote:Possibly no answer is the right answer but if it was me I would leave it and hope that there is enough already in the beers rather than risk bottle grenades.