So here is a 3DCR version of dual extrusion for Prusa i3. The 3DCR Double Unique features: -Nozzle to nozzle distance 20mm or 29.5mm (change without disassembly) -Covers the whole 200x200mm heated bed at 20mm -Fits directly to Prusa i3 X bars with LM8UU bearings -Compatible with J-Head, MG Plus, E3D and other similar -For 1,75 or 3mm filament (just change the PFTE tubes) -Adjustable nozzle height -Quick access dual nozzle holder for easy maintenance -Easy X belt tension system for GT2 belt -Cable management on the back -Manual filament drive tension (direct drive) -Reservations for accessories -For nema17 motors Notice -The PFTE tubes are not in one piece. They are in two separate lenghts. The one from the motor to the hotend is just a guide for the filament. (I dont think it will work with a one piece PFTE) -The bearings I used are 624ZZ bearings www.3dcr.fi Enjoy and print multicolor with the 3DCR Double!