AnFI, sorry to disappoint, but that isn't what I wrote and you took it to be something it isn't:
The pre-cone was put in so that the 1P flapping number ( that's the max during one revolution ) remained under the endurance limit for the bearings. After the stabilator was added during the development period, we used that as a tool to fine tune the stabilator schedule to walk the fine line between the flapping endurance limit and the everpresent need to pay attention to the level flight performance numbers ( and both of those factors as they applied at the extremes of Center of Gravity ).
So, nix on der average coning nonsense.