Man, that magnet fishing story hit me right in the gut, I've done that same frantic search while someone taps their foot up front. Losing a screw in the tank is the worst because you know it's gone the second it slips, and that customer is standing there watching the whole show. These days I just pull anything with loose hardware before it goes in, not worth the risk no matter how good the cleaner is.

Wouldn't skipping the camera just cost you more in the end?

Did the same on a stuck valve last year, camera paid for itself right there.