I don't understand everyone's griping about fermented orange juice? I doubt it'll be like apfelwein because I doubt it would have the same 'crispness' that the apples give. However, I think it's worth a try. Just don't make it like prison hooch and you might turn out something that's not half-bad. I don't know how to cut the acidity though, if you really need to. Fermentation may simply take longer? I don't understand how this can be different than hard lemon/limeade. I may try this soon