Mold negative to positive


I recently designed and 3D printed a mold for a keychain without any problems. I’ve been trying to turn the design’s negative into a positive, but I haven’t found a method that results in a solid. Is there a way to turn the mold into the intended object? Or would I have to start from scratch?SlumpStamp.skp (1.4 MB)

Like this?

SlumpStamp.skp (1.5 MB)

I closed in the negative space by tracing a single edge at the rim of the recess. Then I erased the stuff that wasn’t needed.

Yes! That’s what I needed. It seems I had a single misplaced line that was botching the process. Thank you for your time.

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