@@ -12,7 +18,7 @@ To do this, I steal accuracy from the optical tables in our ~~dungeon~~ basement

The 'rails' protruding on the beam constrain one DOF ... this little tag constrains the other side, so I lay it up with a reference straight. Here, that's just a run of the mill centerless ground rod, but [these](https://www.mcmaster.com/2265a21) types of reference edges are also available.
The 'rails' protruding on the beam constrain one DOF ... this little tag constrains the other side, so I lay it up with a reference straight. Here, that's just a run of the mill centerless ground rod, but [these](https://www.mcmaster.com/2265a21) types of reference edges are also available.