About this 3D model

This is a nice thing if you want to reflect laser beams. I first saw this thing in a scanner a while back. I am using Libs.scad http://www.thingiverse.com/thing:6021 to make the spheres, its really slow so uploaded .stls ready for printing. So referring to the picture, its only the thing on the end, you use a M5 screw to put the ball, base and lid together. Just loosen a little and rotate the ball ... remember to glue a mirror on the ball.