a two year project to create Delta printer. it has 6 machined parts and the rest are purchased or printed on another 3d printer. I have a 4 page bill of material with sources. all files on github. https://github.com/deltagreg/OPEN-DELTA. a source for machined parts is available through our web site. http://opendelta.net/ there are two sub ass'y in files you need adobe pdf to open the you can rotatethese are the files to make the linear rail for this delta printer