I'll keep that in mind. I was thinking more along the lines of books but anything helps!there was quite a discussion of that way back in Shad's thread if I remember aright. If you search that thread I imagine it would come to the surface reasonably quickly - though as with all discussions on threads, it's a bit prone to fragmentation, as participants keep different hours, several different conversations are often going on simultaneously, and it's easy to miss things. But there was some good stuff there.