The mirror box holds the mirror and its sell, its made from 15mm ply.
I used 4 for the sides and a 5
th piece (which has a 20½" hole in for the light path).
This helps square the sides (the mirror cell does this for the other end of the box).
Although for added strength I placed braces in each of the 4 corners.
The inside of the box was painted with matt black floor paint
(if its hard enough to walk on it should be OK for the box!)
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Underneath of mirror box with mirror cell in place.
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Front view of mirror box, with a 20½" hole, you can also see one of the braces in the bottom left of the box.
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Back view of completed mirror box and mirror cell.
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