Thank you for the replies gentlemen,
I have a copy of the Polish card model kit, I do agree sometimes paper models are an invaluable source of information. I've been trying to join forums around the world and I must say I'm happy to have found this forum. Sadly, the modelling community in the US seems to have really diminished in the last decade. It is nice to see this forum going strong. I'm also a member on a Russian forum but the language barrier makes me somewhat timid to post... I mostly just read.
I purchased plans for the Duilio many years ago with the intention of building a large scale model with functional features, turrets that rotated and loaded properly (with blanks), functional torpedo tubes, etc. but lack of primary source information has always pushed back the project. Whole chapters have been devoted to Inflexible in books, but Duilio is often only mentioned in passing. My copy of Conway's is my number one book for research, but as great as it is it is loaded with errors for lesser known ships.
The plans I have are lovely, but I've always wanted to build the ship in a later fit, or really surprise people and build the reconstructed version of Dandolo with modern turrets. I'm just not confident enough in my skills to make educated guesses that everybody has to make when comparing plans to source material and photos. Good clear photos of the two ships are hard to find, and even then they often create as many questions as they answer.
Usually when I get stumped I take a break and research another ship for a while. After Duilio I purchased plans for her arch-nemesis, HMS Inflexible, then I downloaded all of the Pre-Dreadnought plans from the French Archive, then I started find Russian plans, next I started getting copies of plans from the US National Archives, then the Danish archive, then the Dutch archive, and the Japanese archives... almost 400 ships later I think it is safe to admit I'm a shameless hoarder of plans... but I enjoy it