I've made huge progress in my sources and went to the point of spending R$ 24 on an e-book, which was fully worth it. At present I'm compiling my research elsewhere in Portuguese but I'll post more here later on, and maybe even write for Kohlzine - I already have the title, How to overthrow a government in your pajamas.
Now I do have the order of battle of the combat groups that almost went into combat with each other and decent information on dates and locations. I've also found a very important tidbit that only came to light 50 years after the fact: Amaury Kruel received a million-dollar bribe to defect to the rebel side.