Minor annoyances are the screws on the
boom mike loosening, causing the mike to swing freely downward. Can be
easily tightened with a small screwdriver, but how often do you have one of
these at the start of a flight?

- - - - - - - - - - - - - - - - - - - - - - -
ALWAYS - each and every flight.

In my flight bag I have a Leatherman gizmo and a 4 in 1 real screwdriver.