Nah. I'd leave the feeder open, just to make sure a high concentration of cal hypo solution doesn't get trapped in there.

Long post? no. I think the longest one is in an old newsletter; I'm not sure if that one is even available to subscribers at the moment. And, the process is not published (as far as I know) except by me -- Chem_Geek is skeptical I think, for just that reason. My understanding of it is 1/4 guess and chemical intuition (which got me started) and 3/4 practical observation.

I'd bet data exists in old Olin (HTH) files somewhere. But, maybe not. John Wojiitowicz was one of their principle developers and researchers and he could sometimes be standing on gold, and not notice.