After ruining a hood with a power sander, I only trust hand blocks now.
I was blending paint on a modern sedan. The power sander dug in and created low spots. Going back to a hand block fixed the issue perfectly. It taught me that control matters more than speed. Now I train my apprentices the same way.
Totally get it. I burned through three drill bits last week trying to force a hole in some old oak. Switched to a hand drill and went slow, and it was perfect.