Sanding, checking the assembly, gluing and more sanding was the order of the day as I worked on the torsional pendulum. I started by sanding by hand but soon realized that I needed a better solution so I designed and constructed a fixture to hold half the torsional pendulum in the lathe and use the lathe to sand it.
I started with 60 grit and proceeded through 120, 220 and 400 grit to smooth the surface of the first half.
There are still a few surface imperfections that I will sand out. I plan to do this tomorrow after I have sanded the other half of the torsional pendulum and can mate both halves of the pendulum and sanded the joint.