About this 3D model

Aluminum Frame i3 Base on prusa i3 Include a new design to eliminate backlash of lead screw I use this X Carriage http://www.thingiverse.com/thing:586636 Water Cooled Extruder http://www.thingiverse.com/thing:1122033 Frame BOM: https://docs.google.com/spreadsheets/d/1NMDV64ITaBIcRH5-fehJkepfXq_T5dhFiu3tFgBau-k/pubhtml 2016/03/25 UPDATE!! NEW version of X end、X end motor，more stable! X end、Y end now have two options for pulley screw(M5、M3)!