I made a mold out of "DAP" one time. Had to dry it what seemed like forever before I could ever pour into them. The mold was much like yours and was of an old Stanley's/Hales Craw worm, cut off to what you have there and an old worm very similar to a "Pee-Wee" worm. I overcooked those too. Finally threw the things away and bought some trailers, etc..

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