[Michael R.]

Originally Posted by Mike Kelly

Ah yes, . .

https://www.youtube.com/watch?v=Ot8wPGQW3JI A good explanation of how centre drills work. Stefan is (edit) with his precision methods of machining .

. . . has anyone watched this video by adjusting the playback speed 2x ?
Tap the video once for the menu overlay, tap the three dots in upper right, tap playback speed, select a choice, i.e. 2x