Structure making: Spheres structure works well

The sample of the sphere structure I drew was finished yesterday. The result is not bad, I could basically sure about this plan would work, but need to be improved in many aspects.

Analyze this sample, the problem are:

  1. the steel balls inside were too heavy for aluminum shell, I should make their weight more even
  2. the connecting stick between the two steel balls should be thicker as I drew before. It actually doesn’t need this much space to scroll
  3. to be more stable, the inside connecter between two half sphere shells should be a whole piece with the two shells, which could be achieved by using 3D print. Thats my next plan.
  4. Be more beautiful
  5. the shell could be transparent so that we could see the structure inside.

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