Changing blades on pioneer s series 60" cut

Hell,Im about to change the blades on my pioneer s series mower and was wondering how many ft lbs of torque a lot of you are using on the blades?I know the owners manual calls for 50-60 ft lbs of torque,but I would like some opinions to see if this is enough torque.I will be changing from high lift notched blades to low lift blades because of the grass and sand here in Florida.Any info would be greatly appreciated!