Universal Onmiwheel for mobile robot

Updated on 1-Jan-2016: Released a wheel mount for 25GA370 Motor
http://www.thingiverse.com/thing:1238317

Update on 17-Sep-2014: Release a wheel mount for Tamiya 72001 Planetary Gearbox Kit
http://www.thingiverse.com/thing:466438
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With a 3d printer, Omni-wheel is easy to make. However, number of choice is little in Internet.
This project aim to produce Omni-wheel for small scale robot project that:
1. Able to produce more than 80% of its functional parts by 3d Printer.
2.For the remaining 20% of material, they should be easily available with low price
3. Able to assembly with tools available at home.
4. Easy to develop accessory for this wheel to adapt to different gearbox, servo motors.
Please feel free to provide feed back.
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Testing:
https://www.youtube.com/watch?v=WQ2d-EvYX10