I think I'm going to have a problem with the size hole in the bottom of hopper. Im only using a 710w elec drill and I dont think it will be powerful enough to turn the rollers with the amount of grain. I will make to small pieces that will mount inside which will lessen the gap if I have too.
I might see if I can pick up an old dryer and remove the motor, belt and cog thing from it instead of the drill.
