Making plan about what I would do after finishing the table:

Fixing the pin of the piezo sensor and taking the opportunity to solder it to longer wires... ... to put in place the sensor and connect...

Taking notes about where to positioning precisely the big tetrahedron on the shelf and reflecting about tetrahedron on the case (with...

Taking in consideration the pivot movement needed, I tried to calculated the measure for the blade propeller which I would laser cutter...

Reflecting on big dimension and what and how much material to buy:

Source of inspiration: Buckminster Fuller and his tensegrity structures.