No, I have never bought ZBB or really dug too deep on those issues. I do have a live 24/7 chart on my Ecomike board I check daily, and follow the posts here by the ones that keep up with ZBB and trade it, but I do like the technology-concept since I worked on an early version of inventing it (Zinc Lignan, not zinc bromide) in my lab in 1981....but it never got out of my lab (yet).