I wasn't taking sides on the cadmium versus zinc issue. I have no knowledge or expertise to bring to bear on that topic. 26th-Z said "but how does this all matter", which is what HS-30H was referring to with the Brute quote. I think one of the hallmarks of this group is believing that details matter. My comment was meant to commend that behaviour. And Zed, you're definitely one of the people who cares about detail in my view. I don't always enjoy the exchanges themselves, but I think we all benefit from the willingness to engage, and the level of knowledge that results. Sorry that I wasn't clear.