OK, think I found a workaround
https://photos.app.goo.gl/NBogeFn7NpGfvABL9
https://photos.app.goo.gl/5e4HTNUqRkJVHiSF7
https://photos.app.goo.gl/oXmXtu8GEBknSGKL9
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edited to say: nope, that doesn't work either. Seems like we might need a new box fan