Vincent made a video with some experiments and ideas in 2009. There are some recent seastead related things.
video where front legs can rotate seperate from body or back legs also also also

Some more info at islandboys.ai. We made a video talking about a quadmaran solar model we did in 2015

I have made a 1/6 scale model of seastead platform that fits in 40 foot container.

Go to seastead.ai.