Hi

I finished the design of the CG-balancing tool. Today I made a test version and it works properly. It is sensitive and not that easy to use than I have expected, but it works.
I used rolled-shaped PVC as the balancing arm and fitted it with a dowel srew with some play between them.
The friction between the PVC and the steel is very low so it has just a small affection to the process.
I think the inaccuracy could not be more than 1mm.