Thanks for providing the links I did not -- Kids were waking up and I was trying to bang through it! One of the things that I always messed up when calibrating

Thanks for providing the links I did not -- Kids were waking up and I was trying to bang through it! One of the things that I always messed up when calibrating it, is the step using the CD-on-a-stick part. You need to do this calibration phase changing the z axis on different points. Do one low. Do one medium, do some 'high'. This is how the system defines it's 'skew' of projection when it comes to the different heights/levels -- and if you do this step all roughly on the same 'z' plane, it will work, but it will not be anywhere near as accurate / magical feeling. The instructions I believe are hazy on this critical part of the setup. We always used blocks / things covered with white rags instead of sand. Far easier to justify building over the living room table this way, and makes for a quick clean up process! It's 100% super cool. Also, as you said, we use an $89 3 years ago projector. It is NOT a short-throw projector, but mounted roughly 6-7' above the surface. The kinect was mounted on a yard-stick hanging slightly down below so it's field of view covers just that of the table itself. It's a super neat end result; and can be decently frustrating during the calibration phases and software setup, but is worth it!