Hi, there is a layout in holland that has used memory wire for the point control, its called Avontuur in Minaturr and is quite large, there is a web site so a serch on the name should bring it up. I have seen one OO gauge layout that had point rodding that worked, cann't remember the name but the owner had used .5mm wire running through small bits of rail with holes drilled in the web and spaced out at about 40mm apart, it looked quite good. I have used 1mm NS wire in angle drilled on one side to fix to the baseboard and either 1,2,3 or 4 holes for the rodding runs, the longest run is about 20ft and has only one angle crank at each end. I have a 20 lever frame and a 6 lever for the fiddle yard. Although not 'scale' it looks OK and works well. Micro switches under the layout worked from the crank adjacent to the point controls polarity.
Hope the above is clear, have ago with some lenghts of wire and some angle cranks, easy to make from flat brass bar.