Slvrsrfr Posted November 18, 2020 Share Posted November 18, 2020 a possible item, at double the material cost? Link to comment Share on other sites More sharing options...
Thilo87 Posted November 18, 2020 Share Posted November 18, 2020 Build them in a vacuum with bottom tiles that are not connected to the border. Perfect insulation. Link to comment Share on other sites More sharing options...
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