If you need a supplier for some of the parts
Just wanted to drop here the company from China that helps us make most of the parts for these prototypes. They made 1.3-meter-wide copper hemispheres 1.5mm thick, and 80cm ones, and 50cm ones . All of them you can see on the images. They also cut for us the copper triangles for the Stela Octangula. They cut a few of the copper discs for the antigravity device. The bearings and the couplers, shafts, copper rods, and other parts come from this supplier in China: https://demark.en.alibaba.com/ They have great communication, reasonable shipping, and very good prices for the parts.