For me the narrow part (on both pieces) printed with a slit, so the part around the screw hole is really flimsy, and feels like it could snap in half. I'd try printing with the highest resolution available.
It took some filing to make the jam nut fit in the hexagonal hole, as mentioned by the creator.
This thing cages the kinect so it won't fall down, but there's a couple millimeters of wiggle room left-to-right which might be problematic. Also doesn't fit my tripod... I only realized I had a 3/8 inch screw after printing this.