Adjustable spool holder with plate designed for BIv2.5 3D printer

This spool holder adds a lot of space on the top of the BIv2.5 printer. This delta printer can have up to 3 extruders, which have 3 corners to put 3 of these spool holder. The bearings make it so efficient, that the cap in the middle of the spool should be removed to add some tension in the filament. Moreover, the spool holder is designed to adapt for every filament with different width and height.