Print the Windmill Base, Windmill Roof, and Windmill Blades. Purchase a micro RC Servo (Like HobbyKing HTX900). Dismantle Servo, break mechanical stops on Nylon Gear, Cut Mechanical stops in Variable Pot, remove Resistance Brush in Pot (to make the Pot freely turn). Resolder motor directly to 2 wires, and cut wires going to servo controls. And in 5 minutes, you have a under $2 DC Geared Motor for powering your 3D Printed Windmill. You should power it now with only ONE AAA or AA battery. It will last for HOURS AND HOURS even with a nearly dead battery!

The motor is a SNAP-Fit into the base. Once you snap it in place, it is really held in very securely. You can drop the battery down the hole in the base I left. It will fit either AAA or AA batteries with no problem (it was designed that way).

If anyone wants pics, and videos, let me know so I can post them on Youtube and on Thingiverse. I should have more posted tomorrow.

It works very well. Enjoy!

P.S. I made it using a Micro Servo, so it could EASILY be scaled up to a larger servo, by simply scaling all of the plastic pieces.