I took the back off mine this morning. This is what the insides are like:
![[Image: carbtune.jpg]](https://s19.postimg.cc/bao8w0ijn/carbtune.jpg)
That's with it held upside down so gravity is simulating about 14cm of mercury.
You can see the bottoms of the rods have screw adjusters so the columns can be matched.
![[Image: carbtune.jpg]](https://s19.postimg.cc/bao8w0ijn/carbtune.jpg)
That's with it held upside down so gravity is simulating about 14cm of mercury.
You can see the bottoms of the rods have screw adjusters so the columns can be matched.