OK, I think that's enough galleys for now. I added five more over the weekend - some more lanternas and some more galleys. I can now field two Lepanto-era forces, each of three squadrons (each with a flagship) and roughly fifteen vessels a side. That's a decent-sized game of Galleys & Galleons by anyone's standards.
Time to embark on some different ships, although the project I really want to get on with is waiting for some relevant Osprey books to wend their weary way here from the UK.