Vacuum powered turbine, 608 bearings, NO MACHINING. Gas (air) Turbine

Cudos to RichMac,
8 mm threaded rod shaft
Scaled up by 1.5 to fit 608 bearings (A bit loose still).
2.75" long by 2.7" dia.
Quite a bit of power .
I reworked the rotors to fit 8 mm nuts into them.
One piece of 8 mm threaded rod, two 608 bearings and six 8 mm nuts. No machined parts are needed at all!
Print, assemble and hitch up to a shop vac BUT BEWARE!
This little monster spins up really really fast and may grenade in your hand. Wear eye protection and take all precautions to stay out of the way of flying bits should it come unglued!
Well, I tried to get it to fail under full shopvac vacuum in a piece of ABS 3" Sch 40 pipe and it held together, still, your results may vary.
test one: http://youtu.be/zYztfiSIDPg
test two: http://youtu.be/cuFDzIHzins
Got all but the rear housing dwg up, need that from RichMac...

By numerous requests I have reverse engineered the back housing and posted files. This is a bastardized stl for the scale. Did the best I could. Enjoy.