Impossible Dovetail

I created this OpenSCAD design to show a different way on making an impossible dovetail. The joint is slid together at a 45 degree angle. I'm pretty sure I have seen this method before.

I have not printed this, but I believe this is printable. YMMV.

Watch this video to see my inspiration and the other way of making this:
http://www.youtube.com/watch?v=YpuV9ZdHHlY