Cube single stepper convirsion for twin leadscrew

Experimental design to substitute dual Z axis motor setup in cartesian 3D printers. Bearings are 605zz, threaded rods and nuts are M5. Use white teflon grease to lubricate. No backslash thanks to spiral gears. It is a Remix of the Nema 17 right angle gearbox created by dasaki. Unfortunately I cannot link to the files he provided. You will need aluminum profile to mount the stepper motor between the Z Axis lead screws. The design is still in development so check before you make.