Centering indicator - video

Centering indicator. By jm.workshop.q8. 15:39 video:

https://www.youtube.com/watch?v=bGhcNjOEs08

YouTube page (click on the "Watch on YouTube" button) has a link for 3 pages of drawings for this - just clink the link, go to the " ••• " in the rightmost column, and click on download.