Wind driven prayer wheel

https://youtu.be/NYXPqTRUikQ
8-7-2015 Finally struggled through these prints with my old prusa i3. I had to use some hot glue patches where the print came out wrong.
Anyway the first one works.
http://youtu.be/Ow18Z0k05fY
In Tibet and Nepal you can see holy people spinning wheels similar to this. The theory is that with every rotation the prayers of compassion, that are written on the side, will go out to the world. Some prayer wheels are situated over a stream, and driven by water.
This design is based on an efficient Darrieus wind turbine, from 1931. I used the standard 60 degree helical swirl for stability. The blade has a profile plotted around circumference, instead of being symmetrical. This non-symmetrical blade profile gives more efficiency and easier self starts.
I wanted a design that would spin in the lightest wind, with the absolute minimum resistance. I tried various planetary gear mechanisms. The result was too much friction, and the wheel couldn'