Mark Furneaux | Random Teardown #010: The Electric Screwdriver 800 @TheUbuntuGuy | Uploaded August 2015 | Updated October 2024, 3 hours ago.
Grease everywhere. I found upon reassembly that the clutch is ball bearing and disengages the outer ring of the gearbox. The slippage I showed is actually the clutch slipping due to no preload spring being installed.

I reviewed this here:
youtube.com/watch?v=zX2UW_B3uLE

I have a second channel: youtube.com/channel/UCN3Dgu6CVBcecDkc5DmIIqw