In addition to the printed parts you will need:

1. (2) 6082RS sealed ball bearings
2. 5/16-18 x 2" hex bolt
3. 5/16 - 18 tap
4. 18" x 5/8" OD pipe

I used the bolt with some washers and a hex nut to pull both bearings into the housings.

I used Loctite when installing the propeller bolt. 

The pivot pipe was a loose fit but I just glued it in properly.