Quote Originally Posted by roughrider View Post
I remember seeing a video that said if the Norton sticks to the wet plate glass upside down then it's flat. Is this true?
Depends how much water is on the stone. It can *look* like it is fully in contact with the glass if there is a lot of water on the stone. It should stick and look flat with only a little water. That's when you know it is really flat.

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