Rudder Construction

In about 10 days I will be slipping Sultana to evaluate the options to replace the badly worn propellor, including a feathering prop option, one of the "unknowns " at this stage is if there is ample room in the arperture for the prop to feather, one suggestion if there is not is the option to remove material off the leading edge of the rudder to create the required space.
What I am not sure about is the construction of the leading edge of the rudder about midway, just wondering if someone can shed any light on this please?