My second attempt. It came out a little bigger than I figured. This is the "Parametric Tardis" by "Gossamer." I set it for 75mm, and that's how high it made the main box, but there's about 15mm more for the top.

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The layers seem to have warped and separated a bit.

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It got very cold in the room while it was working. My apartment isn't exactly upscale and we had our first cold night here in NE Oklahoma. Perhaps the mod where you put covers around it should be the next project.