Okay, heres a couple more questions:    Do you use a metal coffee filter each time, or do you use finer filters after the first one?    How did you decide that double the quantity of vinegar called for in Marsofold's tek was needed?    This isnt really a question, but I think you need to be a little more specific in describing basification. The Antarctican and most other A/B extractors I know have found that an additional 25% lye is needed after the solution goes slippy black.