LW50, it`s over 40 yrs since I last flew both..officially,and never to a deck,but I`m sure someone will correct me,and add knowledge.
It also brings into asking the question about auto-revs setting after blade changes/tracking,and how often is that checked,as blade condition can deteriorate..
The other occasions that we used to adjust the basic/minimum pitch setting was doing icing(real)trials..no heated blades, and the possibility of having ice on the blades in the event of either engines failing(due ice damage/surge,etc),or a transmission failure,which did happen(oil filter came adrift), going to the ultra low pitch would hopefully keep one safe( and a lot of spiral descent for good measure)..We also wore parachutes...