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Today hasn't been good. I've ruined several parts blanks without forming a successful part. Can't get the metal to form around the nose of the form blocks (flaperon ribs, slat ribs, elevator ribs) without kinking the metal. my measurements are all good, my parts blanks are all good, but the aluminum just wants to kink and crack, and won't work it's way around the radius. Any suggestions anyone? Part of the problem seems to be the soft plywood forming blocks, but I've literally just ruined 8-10 ribs on 3 different sets of blocks.