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Yes, I know I'm not supposed to do this but I started it and now can't find a tool (bit or hole saw) sharp enough to drill out a 1.5" hole for a water filter.
I started it using a carbide 1/4" and then 1/2" concrete bit and then used a sawsall w/carbide blade to try and widen the hole. Now I'm at a lose. Any ideas or tools I should go after. I do have an enamel epoxy repair kit to handle the scratches and any chips that result. I thought there might be something in the plumbing trade but haven't found it yet.