Adding BA directly worked for my first pull but following pulls caused issues. I'll used dissolved BA like you mention. ThanksFor the pulls I use excess naphtha, say 100-150ml (extracting from 200+ grams of bark). The benzoate crashes out easily as it is insoluble in naphtha. I highly suggest using BA dissolved in an NPS. In your initial pulls, you can add in a good amount of BA solution, as there will be plenty of DMT in there. Your can add for example 30-40ml and stir, flakes will form, like when you make cottage cheese. In later pulls you can use smaller amounts of BA solution.