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Portable hole? Answered

I recall there was an instructable about making a portable hole, or optical cavity with lights in it. As far as I knew, it was used as a coffee table, but I can't find it now. Has it been removed?

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This portable hole is the only one I remember seeing recently. But then I was just looking at their catalog a few minutes ago :-)

I predict that an LED version will appear here eventually.

Was on my to-do list. With movable lights to make a nifty shape-changing tunnel illusion.

Actually, if you browse the site there's some pretty cool, Instructable-style stuff. Plenty of inspiration for the bored.