Gentlemen since I became a member of this forum I have refrained from commenting preferring to treat inaccurate statements with the contempt that they deserve and absorbing valid facts as an aid to rectification of defects.
However as a licensed avionic engineer with 25 years experience on super pumas I have to inform you that there are three float firing switches, one on each collective & one on the control panel, only the one on the control panel is guarded by a mica diaphram, the others are recessed inside a housing. An SB was introduced years ago to resolve the collective water ingress problem, this involved potting the firing switches terminals & drilling a water drain hole in the switch housing.
As for the location of the AP couple disconnect switch it is located on the cyclic. Not quite 6 feet away but far enough.
So in conclusion gentlemen get your facts correct before you post, honest it really does help understand what you are on about.