Ender 2 Pro Y axis belt tensioner for extended travel

This model allows you compensate bed size losses due to some custom direct extruders. It is compatible with 6mm belt (uses stock F624ZZ bearings - just print two spacers included) or 9-10mm belt (add one simple 624ZZ). Also you will need M5x40 hex bolt, self-locking M5 nut and one 4х25 shaft, as well as two pairs of M4 T-nut and M4x8 screw