At work, while waiting for results of tests etc. I usually am fiddling with something, mostly my thumbs but at nights it's some sort of card model project. Then the question, is that paper and why? etc . comes up. @-3 years ago when reading Patrick O'Brian, I had to have a sailing ship. I bought several books on scratch building these things and one of the books came with the hull lines and rough plans. They were meant to be in wood, but as the tools required to do the job were cost prohibitive,(lathes, ripping saws etc), I turned to the media I know best-paper. I just substituted card for the wood stuff and well here are a few examples. The first series is the hull for a sloop much like the finished Lee to be shown later. It is plank on bulkhead. I laid the plans for wood out built the formers by laminating them to 3mm and assembled them as for the wood hull.