The cam out problem with slotted screws can also be avoided by using an
appropriate screwdriver. Commonly called Gunsmiths screwdrivers, they have
either a blade that is flat on both sides (no taper), or a more expensive
hollow ground blade. The hollow ground blade is actually somewhat concave
above the tip, assuring that the torque is applied only at the bottom of the
slot. There is no cam action with either one.
RW
'72 25' A/S Land Yacht