! Update Apr 11, 2015 ! New files and a second version. (http://www.thingiverse.com/thing:766843) Didn't like the original x-carriage. Added a screw mount for the endstop on the x-carriage by eMotion-Tech (http://www.thingiverse.com/thing:119616/#remixes) for Prusa i3 Rework. One for T5 belts and the other one for GT2 belts. The 625 bearings for the X-belt and the Y-belt needs a small m5 washer on each side and then one large m5 washer each side like: (large washer - small washer - bearing - small washer - large washer) Might needs some washers between bearing clamp x, y belt holder.stl and printbed lower carriage. Added a longer bearing clamp x (bearing clamp x longer.stl) and y belt holder.stl (y belt holder longer.stl) instead. You need: A K8200 or 3Drag and some extra screw, nuts and washers (m3, m4, m5, m8) Zip ties. Longer feets (http://www.thingiverse.com/thing:719859). Optional (probably best to get it): 2x Springs for the backlash on (z_holder_endstop.stl) and (z_holder.stl). Nema 17 stepper motor. M8 threaded rod. Coupler GT2 belts and pulleys.