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The only trickier bit is to find tables that are both sufficiently sturdy and sufficiently stashable.
Maybe it would be more useful to share several designs to give to the local craftperson? Maybe as a crowdfunded project? Those 23000 people that signed the petition will gladly pledge to the project, right? With just an €/$ each, they could found a brainstorming of designers.
I have not yet seen a mass-produced table that expands into a square though.