I am radically redesigning the Prusa Mendel. I call it the 2012. More plastic parts, less hardware, and some much needed improvements. Read about it here: http://www.plansandprojects.com/My%20Machines/PrusaMendel2012-1/ New parts will be uploaded as they are proven. Many features are derivative of other parts on thingiverse. Thanks to everyone! We are standing on the shoulders of giants.You may want to wait until the machine is together and working. Print the parts and bolt together with 6-32 screws. I am using long screws and cutting to length.