Step 1: What You Will Need
Here is what I used:
-Magnets ($4)(craft store, home store, online, etc)
-Laser Pointer ($1)(Dollar Tree)
-Hot Glue Gun
Step 2: Layout Your Dimensions
Make sure the end of the board sticks out slightly past the widest part of the lid, as shown in the picture.
Step 3: Drill for Magnets
Technically you don't have to even drill holes for the magnets, you could probably just hot glue or epoxy them to the board, but I felt inspired (it being a drill press Instructable and all). So if you need this tool just as fast as possible, skip the drilling.
Step 4: Get Into the Groove
This is another step you could technically skip, but because the laser needs to be parallel to the drill press post, I recommend the groove to get the angle right.
Step 5: Secure the Magnets
You could, of course, use epoxy or something else instead here.
Step 6: Add the Frickin' Laser Beam!
Attach the laser to the board with the wire nails. Make sure the laser is pointing as shown in the pictures, with the laser output end on the same side of the board as the magnets.
Just leave enough room around the switches so that they don't stay on and that you have room to operate the switch.
If your wire nails are not as tall as the laser is big around and they should hold very well.
Step 7: Target Practice
Put a target on the table of the drill press where the laser is shining. Make a set of crosshairs where the laser beam is. The thinner the crosshairs, the more accurate you can make your setup and the more repeatable your results will be.
Photographing a laser turns out to be a little harder than I expected- you can see the pictures of the crosshairs, with the center missing from two pictures and the crosshairs are intact in one. The intact crosshair picture is with the laser off, the other two show the laser on and centered on the crosshairs.
Step 8: Wrap It Up
This particular build will officially be a (working) prototype for a couple of reasons:
-While the magnets I used are strong, I wouldn't mind getting stronger ones still, just to insure less chance of any movement
-My dollar store laser was cheap (literally a $1!!!), but it only stays on when you hold the button down. It would be much easier to find one (even if I have to pay a few more dollars) that switches on and off rather than holding the button while trying to align everything
There you have it!
I hope you enjoy your laser alignment tool