May I ask you one question. In the last modernization, the stabilization fin appears high in the sumerged part of the hull (in your drawing it looks closer to the flotation line than to the keel). Do you know it it was because the cruiser was overweight? Happy new year and cheers.
I used the same hull for all versions. As I said before, underwater details are speculative and all suggestions are welcome. One Brazilian Navy bureaucratic hero burned almost all Arsenal de Marinha do Rio de Janeiro old blueprints in the 1970's, including monitors designs of the war against Paraguay! By the way, I'm Brazilian and, obviously, have a great interest in my country historic process...
More details about the War of Paraguay: http://theglobalstate.com/history/the-w ... -alliance/
PS: The huge Paraguayan fortresses complex was built by Brazilian Army Mission engineers in the government of Carlos Antonio Lopez, father of Solano Lopez.