Yes the thread has drifted and left me with the feeling that nothing will change in the NS as a result of this sad and, it would appear, avoidable accident.
Inadequate post-conversion training and monitoring of 3rd party training solutions, no HEEDs either up front or in the back (the breathing out on ascent issue during training is easily rectified), poor passenger seat layout and escape exit options, flotation gear sited where it is convenient for the manufacturer, not where it will prevent inversion - and many other issues have been raised on this thread - anyone actually going to do anything about it or will it be more wringing of hands and complaining that it is all the bean-counters' fault?