I have unfortunately lost some of the construction photos, so, in lieu of illustrations, have tried to make the written part as detailed as possible.
Everyone always asks me if it's comfortable. Yes. The key here is that the balls are not glued in place or screwed through somehow, so they can flex and deform. With the body distributed over fifty of them, no single one makes a pressure point; the slope on the seat pan, and the U-shaped contour on the back match butt and back as closely as possible, giving spine and tailbone some breathing room.
The fact that they are not fixed in place also means that they shrink and expand from their holes with changes in heat, humidity, and altitude, as the air trapped inside the balls changes in volume.