Pulverizing glass.
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Previously:
https://www.homemadetools.net/forum/...517#post170122
https://www.homemadetools.net/forum/...384#post188944
https://www.homemadetools.net/forum/...669#post178388
https://www.homemadetools.net/forum/...561#post158949
https://www.homemadetools.net/forum/...773#post174989
