I have an old SUN distributor machine at work. I guess I could make a short video. I will have to see if I have any distributors.
Better yet, send me your distributor. I can:
A. show you how it works, or...
B. fix it so it does work.
No charge!
Have you ever put a light on the balancer? What is your idle advance compared to your 3000 rpm advance? No vacuum.
If you have advance, your rotor IS moving. That's not to say it will be out of phase, just that it is not in a "fixed" position.

"use it 'till it breaks, replace as needed"