This turbine blower assembly was inspired by http://www.thingiverse.com/thing:39755. I had some problems finding the right motor/gear combination so I modified the turbine so that it could fit a common 9-18V electric motor. I believe I used a Radio Shack# 273-256 The upper housing has added support in the output tube that can easily be cut out. 3/24/14 - Added solid models! Enjoy! The hardware required is: 7 M3-.5X10mm Socket cap screws. 7 M3-.5 Nylon Lock Nuts 14 M3 Flat Washers and 2 screws for the motor. I don't know the exact size. I couldn't find them at the Home Depot. I robbed them from a junk laptop I had in my basement. (Possibly M2 or M2.5?) Enjoy!