Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:2925230.

24/05/2018: Updated to v2 which reduces filament by about 25% and print time by about 15%.

This will support the Z-motor and align it correctly to prevent the leadscrew from binding. You will no longer have to use paper/card or leave the motor loose to prevent the binding.

Check pics for installation.

Rotate the model in your slicer like I've shown in the pic before printing.