Again, good points Ian. I appreciate the discussion. I have been fascinated by Rodinal for years.
I might add that I was toying with the idea that Agfa used the HBr salt of the p-AP to get the Bromide in the final developer, as the Chloride might be a variable that they did not want. OTOH, the Chloride may have functioned as it does in Microdol X to an extent adding its solvent powers to the Sulfite. IDK. All fascinating.
The final step was indeed a pH adjust due to the fact that the "system" was in an unbalanced state for hours after mixing for some reason and had to be rebalanced. This was one of the sticking points of Rodianl manufacturing.