CTC Dual Extruder 3D Printer prevent hitting extruder to wall You will have to modify the start G-code to prevent hitting the extruder against the frame of the CTC 3D Printer Something
CTC 3D Printer DUPLICATOR 4 Dual Extruders Space board+1Kg ABS/ PLA for MakerbotのeBay公認海外通販|セカイモン
CTC 3D Printer Wooden With Dual-extruder - Zhuhai CTC Electronic Co.,ltd - ecplaza.net
Amazon.com: Enclosure for CTC Duplicator Style 3D Printer : Electronics