About this 3D model

a parametric bracket for mounting a GP2Y0A21 Sharp distance sensor to a robot. Videos: Part 1: http://www.youtube.com/watch?v=wpiCV7Leegk Part 2: http://www.youtube.com/watch?v=ccXk3cwn0Bk Part 3: http://www.youtube.com/watch?v=sgW6iJvywh4 Part 4: http://www.youtube.com/watch?v=jCdaVU2rXHg Part 5: http://www.youtube.com/watch?v=mTKlPUFRejY