I think it was determined on another site that mescaline Hcl from an A/B extraction is around 88% pure before clean-up.
350-400mgs is enough for a good trip.
Hope you got to enjoy all your hard work.
Now you have to get some more cuttings and start planting. In a couple years you'll have enough stock to keep you and few close friends supplied with pleanty of head candy.
The bridge between goals and accomplishments....Self-discipline.