Very informative and detailed article. The only additional thing that might be interesting, if it could be done successfully for presentation on the web, would be some illustrations from negatives and/or prints showing the effects of different pyro formulas, maybe with a standard developer or two like D-76 or HC-110 in there for comparison. I realize that there are resources like this out there in back issues of _View Camera_ and such, but it seems like this would fit naturally here.