Shop-altered pushblock helps remove cup
Here's a way to remove one side of the cup in warped boards at your jointer. As shown in the drawing at right, a cleat added to a regular pushblock helps get the job done safely. To accomplish this, first flatten the concave side by face-jointing. Then remove the convex side of the warp by running it through your planer with the new flat side down. Be sure to take into account your reduced stock thickness in your project.
-- from the WOOD® magazine shop
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