About this 3D model

This is modified i3 vanilla x-carriage to fit mounting holes of i3 rework extruder (4x M4 holes). You can easily modify file in OpenSCAD. You should use 4x 20mm M4 screws with head max diameter 7.5mm (possibly anything with hex head). Belts are set to GT2 by default. to change belt setting open configuration.scad.