I inherited an old Magic Mill with the grain adjuster on the front (although just missing a knob?) and lots of old wheat flour in a old sponge next to the stone.  I have no instruction booklet but it seems that the motor turns on but the stones must be too close together to turn.  I am not exactly sure how to adjust it.  Would it be okay to get rid of the sponge material---I am actually very surprised that I don't have bugs all over as there is some very old flour there.  What would be the purpose of the sponge?  It's also missing the pan underneath and the metal funnel device for the top but those won't prevent it from running.  Any advice would be greatly appreciated!