Once again I repost these pictures I found online in 2013. I'd do it this way — simple-curved pieces in a hexagonal plan. It could be simple and light, done in Polymetal on a steel frame. Curved seams (extruded H-metal) mean no internal bracing would be necessary.
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.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
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.Because much of what is in the published literature is nonsense,
and much of what isn’t nonsense is not in the scientific literature.
-- Sabine Hossenfelder
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