what you need:
5x F695 bearing
6x M5 1mm spacers
1x MGN12H Linear Rail - 300mm
5x 20t GT2 pulleys
2x Stailess Steel Rod 5x60mm-Grind Flat
1x GT2 Closed Loop Timing Belt 324mm
1x 2020 Extrusion - 340mm
1m gt2 belt
1x stepper motor
Printed Parts
Y carriages can be cut by www.sendcutsend.com
Distance between rails is 150mm
Each rail is moved 75mm off center.
The author remixed this model.
2nd Y rail and motor