Double extruder for alluminium extrusions Profil 5 20x20, usually used on most of DIY CoreXY Printers, with possibility to move the area of bearing-spool contact up to 10° (see pictures), in case you need to print Nylon, Flexible materials and so.I still have no idea since i've never printed it, gonna try it out as soon as possible and write down a feedback in case it works (hope so).Feel free to comment, ask, and (whynot?) to try it out leaving a feedback so to optimize project.