Molding memory foam.
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Previously:
https://www.homemadetools.net/forum/...554#post132386
https://www.homemadetools.net/forum/...277#post138673
https://www.homemadetools.net/forum/...193#post184679
https://www.homemadetools.net/forum/...737#post182970
https://www.homemadetools.net/forum/...427#post196764