Solid Geometry

I am revisiting the 3D printing / design hobby after a long hiatus. When I originally uploaded the Octet Truss construction kit, the Shapeways pricing algorithm did NOT include per-part costs and the kit prototype in my shop was around $100. Now that per-part costs are included, the kit version seen here is absurdly expensive. My current goal is making a new Octet Truss version available that uses "sprue" to reduce the part count and return the price to being reasonable!