Ok Umi-
Since you mentioned building according to fast gun rules, I started looking at big gun rules. It would be a while,but I think it'd be fun to have two Rivadavia's, one for fast and one for big. If I understand the rules correctly, (I looked at the Western Warship site), I could have 8 guns firing 7/32 load, I'd able to fire every 6 seconds. Since my main armor belt runs between 4" and 11", depending on location, I'd be albe to have 3/32 thick balsa sides. My reference book lists the Rivadavia at 22.5 kts, so that interprets to approx. 51 seconds. I didn't fully understand the reference to secondary weapons, (I have 16), but I did read the part about torpedos, got 2 of them. I'm just wondering how to fit all that in a 4 ft ship with an 8" beam. Also, how many shots does each gun have? In fast gun, the cannons have a load of 50 to 75 shots per gun, I'm guessing big gun is a lot less, since firing speed is more realistic.