This can easily be machined in aluminium to high tolerance. A drawing can be sent to most cnc companies: Maybe an initial test to keep the price down. They could be concentrically hung as a wind chime. I don't think small hanging holes in struts would sig interfere with resonance
@Albertotufaile , @TheAbstracteer : here's something else I want to construct:https://physics.stackexchange.com/questions/469029/sounds-of-polygonal-ring-chimes-of-metal …
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Also can be 3d printed in 'fused metal', but can be a bit expensive but quotes available from 3d printing companies on line with submission of a drawing.https://craftcloud.all3dp.com/?utm_source=all3dp&utm_campaign=navbar …
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