V3: modified linkage for either the motor or generator side can be attached. Also bored a hold 100mm for the shaft to provide a more stable core to the turbine. PRINTS FINE UPRIGHT WITHOUT SUPPORTS. UNLOCK AXIS SETTINGS AND SET HEIGHT AT 88% FOR MK3S.
Redesigned for attaching to 3d printed halbach motor at:
https://www.instructables.com/600-Watt-3d-printed-Halbach-Array-Brushless-DC-Ele/
print with height at 88% for i3mk3.
The author hasn't provided the model origin yet.