The triangles were machined from sheets of black ABS plastic. One sheet of triangles makes 8 full triangle stacks. One side was machined first, and then positioning pins were drilled and used to accurately flip the material over to machine the other side.

Each side took about a week for the machine to finish. Because of the long machining time, I decided to cast parts later to avoid machining all the pieces needed.

Once both sides of a row of parts were finished, the support bars were cut and sanded off.