Large Wind Up Motor Restoration

I think this motor is from a very old barbershop sign. I welcome advice.
It will run for about 20 minutes on a full winding. Very low torque. I dipped and flushed the coil spring assembly in carburetor cleaner for a day instead of breaking that part all the way down. I am considering converting the motor over to roller bearings to see if I can get a little more power and longevity out of it. Now that I have cleaned it I can consider a sculptural concept that it will work in.
To see more detail on the disassembly and reassembly of the motor go to this page

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