Vinegar Use in making ayahuasca

[mcary]

A friend of mine will be using distilled water, white vinegar (says that it has a 5% acidity) with caapi & mimosa to make ayahuasca.

he has a few questions:

1) How much vinegar per liter of water?

2) Is it better to let the caapi and mimosa sit in water and vinegar for 8 hours or so before beginning the cook?

3) Should he use the same amount of vinegar for the caapi as he does for the mimosa?

Thanks the assistance!