The MkII Wind Turbine from 3dprintable1 is an excellent model but have taken to upgrade some of the components.
The original plans files are found at: https://www.thingiverse.com/thing:2060281
The first change is the crank arm which holds the turbine blades on.
Improvements are:
---Version 3---
Made the 'tube' wider on the outside and tighter on the screw width.
Changed the hex head size to be tighter.
All changes are incremental in nature.
Printing in PLA at either .15mm or .2mm appears to work.
The author hasn't provided the model origin yet.