Some times (like for the dynamic Newton meter) you need to fine tune the direction the cat laser is pointing. So we built a laser pointer pointer that can be rigidly attached to something and you can change the way it's pointing by adjusting screws (really bolts) and also turn it on and off.

• Change the x (left-right) by turning the screw sticking out to the side.
• In use it's attached by bolts through the holes in the peg board. Adjusting them (and possibly inserting a shim lets you adjust the y)
• There's a black clip (mostly hidden under the blue strap in this picture) that slides over the button to turn (and hold) the laser on. Don't forget to slide it back when you're done so the batteries don't run down.