About this 3D model

For those who just can't get enough of burr puzzles... This puzzle's design pulled from [the now defunct IBM research page](http://researchweb.watson.ibm.com/BurrPuzzles/B6HB10.html). It was categorized under General higher level burr puzzles. This is a level 10 puzzle with a unique solution. These pages are still available through internet archives, see the links at the end of the [wikipedia page](https://en.wikipedia.org/wiki/Burr_puzzle). Note: I rotated piece 4 to turn an overhang into a bridge. This built cleanly on my cupcake with minimal sagging at the default size 6. While I found the Philippe Dubois burr slightly challenging, I found this one much harder. I have uploaded the puzzle file for Burrtools, see [Burr Tools on sourceforge](http://burrtools.sourceforge.net/) which can animate assembly too.