The idea for the current tab/slot/mortice design came overnight, but after a lot of thinking and experimenting. The helicopter is slot joint assembly, simple and commonplace but I couldn't get that to work for the boats I wanted to make. So after initial success with the helicopter I changed direction to the tab/slot structure.
Once a basic hull structure was established I re-examined an earlier attempt at a RoRo Ferry, reducing the size to a more manageable 20 cm length and finally getting the two door and winch model I now have.
I registered these designs - it doesn't cost a great deal and can be done in batches - then went on to design a fishing boat, a tugboat and a lifeboat. By now I had graduated (June 2018) and so no longer had access to the laser cutters at uni. So I began looking for a small batch producer in the UK, a problem I only solved at the beginning of this year with Basically Wooden, laser cutters in Devon.