Once upon a time there were plans, detailed plans, available. Cant remember who did them, sorry. Sirmar also did detail drawing sheets. Not a lot of use but if you do some google searching something might pop up. Also if you search on MBM for my posts, in the distant past, there are photos of mine and there may be a clue as to where I got my plans/information from.
PS, lovely ships, i did 2, at 2 different scales.