I have an old pedal-powered sharpening stone something like the ones pictured in the links below.
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metal parts are so rusted the frame no longer stands up by itself. I am going to rebuild it if I can just get the stone rounded again. The center square hub hole is in good condition, but the outer rim is not concentric with the hub. One side is about 1 inch greater radius than the other and the wheel is way out of balance.
How do I get the stone back into usable roundness and balance without breaking it?
Shorti