Next question seems to be hard for anybody to know answer (I tried different companies): I am going to fit second extruder for Ultimaker Original for using two different colours. I am using Cubify Design software for design. There are several slicing software to support two colours, but none design software. I tried to learn Blender, which will answer the need, but Blender seemed very difficult for me to learn. I have Solidworks 2004 basic version, but that has no fuction for two colours. Do you know any software to support that fuction?