Although they do look pretty close to the proper dimensional ratios, the actual puzzle is one of very exacting tolerances. I would be AMAZED if this Lego creation managed to get all those ratios and cumulative measurements correct. Or to put it another way, "perfect".
Not trying to rain on anyone's parade. I have personally built a six piece traditional level 4 burr from Legos, and I'm all about exploring alternate materials to build puzzles I'd otherwise never have. Props to the OP's office mate for the time and effort. Oh, and if by chance this really is a truly functional Casino clone, sign me up for the parts list