Thanks for the suggestion and story. I’ll look into mold release agents. I’ve used a tool to cut precise tapered plugs from wood before, but this particular application requires something molded.

I like the story about the cast holding tank. I’ve thought about putting a holding tank under the house to collect rain water, but getting a tank into the location presents a formidable challenge. A cast tank would solve that.

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Toyota is a leader only because their drivers block everyone behind them. Oh what a feeling.