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Hobby cutter has a hard time polishing a diamond

Did you see the whole machine vibrate when he pushed into the cut?
His machine is not stiff enough nor fast enough.
 
This was fun to watch. Thanks for sharing.
 
Did you see the whole machine vibrate when he pushed into the cut?
His machine is not stiff enough nor fast enough.
Also not sure he knows that there are hardness directions, but I think he had it roughly aligned in a soft direction - Yoram???
 
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