Thanks for posting that info. Very interesting! It tracks perfectly with my latest experiences. When I posted "6 to 40", I hadn't stumbled on salt-into-silver precipitation ("normal" historic emulsion making has it as silver-into-salt). That's made a Universe of difference in speed. The take home message for me is that all the limitations we think (or have been told) exist to making our own materials are probably wrong. Dream it; make it (only caveat: still a lot of work.)