A poorly rigged slat could spell disaster.

Not usually a problem if only called upon to do their job in 1 G level
flight. It's slat behavior in the flight regime at 300+KIAS that mark the
work of a capable airframes shop.

OK, I've never been there, or done that. But it seems to me that the slats
are *really* simple. Obviously I'm missing something here. What is it
about the design and/or maintenance of the slats that requires "a capable
airframes shop?"