After starting with a design that could be easily manufactured on a lathe and mill, the evolving needs of the suspension system, particularly the need for compactness, required constant part revisions. Eventually, it became clear that Additive Manufacturing (3D printing) would become the only way to manufacture these parts due to their complex geometries preventing the use of traditional tooling techniques. The oldest designs can be seen on the left while the more recent ones are to the right. Each design has typically either reduced the overall height of the suspension column without compromising its travel distance or reduced its width to avoid interference with other components. It has also been designed to use standardized parts; all screws are either UNC #10 or #4 (even part that prevents the top of the suspension column from separating from the bottom was set to be a #10 from the beginning)!