"For those of you pontificating on proposition of potential propeller problems --- what, in heaven's name do you think reduction gears/drives are for??"
Of course there are reduction drives on many aircraft engines Leadsled, that goes without saying.
Point is, many look to auto conversions due to the affordability factor, without considering the need for reduction.
A planetary reduction like on a PT6 or double helical reduction like on a Merlin adds cost.
Company I worked for tried it, sunk a lot into it and ultimately failed to achieve a reliable cost effective auto conversion that suited their operation.
Which was a shame, as they put quite some effort into it.