Mad, bad and dangerous to know - the C.S.S. Mississippi under construction.
The C.S.S. Mississippi features twenty gun ports which for my model are each of 5mm square cardboard. There are then five hatches also of 5mm card so that is twenty five 5mm squares in total. It was not difficult to do but care is needed for sure - that and a steady hand with a good set of tweezers! Of all the models I have built this is the most amount of 5mm squares I have used on a single ship. Mercifully the remaining casemate ironclads need rather fewer!