As promised. Here is a step by step guide to how to do this with lots of photos. I highly recommend doing the "MJ400 mod v. 1.0" version for those without access to power tools and are less skilled in DIYness
The materials needed are:
1. 1.25" plastic propellers (Towerhobby.com)
2. 0.098" OD carbon fiber rod (Towerhobby.com)
3. 1.5" PVC pipe or 1.5" PVC slip bushing depending on what version you want (Home Depot, Lowes, etc...)
4. 1.5" PVC test cap to be used for the "v.1.0" version using the 1.5" PVC slip bushing (Home Depot, Lowes, etc...)
5. Thick CA (cyano arcylate) glue (towerhobby.com)
6. 1/8" thick acrylic (scrap pieces)
7. Rigid airline tubing (LFS)
8. Flexible airline tubing (LFS)
Now onto the photos....