For multi-colour 3D printing, an everyday twin extruder 3D printer, one which includes a solitary mount for the twin nozzles, is good enough. But don’t hope it to get as fast as one extruder 3D printer, taking into consideration the extra pounds on the print head influences the print speed. https://hectorgtmam.timeblog.net/65508488/multicolored-3d-printer-for-dummies