Hey Pchemist, I see you've given the CBC commenters some useful information, pointing them to the forum and to the blog. I think that TPC's blog is fantastic -- even before venturing on to the forum, I've been a faithful reader of the blog. Great information, presented in an easy to understand style. I hope some of them follow your suggestion -- having more information definitely makes this a more engrossing pursuit (sigh . . . actually, even addictive).