Just tried, and it worked fine on Illustrator CC. It has been created with Illustrator CS5. What program are you trying to open it with?
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That should not be a problem. You just need to broaden the eight slits from 3mm to 6mm.
That should not be a problem. You just need to broaden the all eight slits from 3mm to 6mm. Your stand will be much stronger than mine!
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