The rudder on the ones I have done have all been the same, only a support block on the lower part of the rudder, this does not suit our purpose, what I have done is to open up the area between the two rudder horns completly to make a big slot and inserted a balsa former above the top horn, I have not got a picture of that I am afraid, make up a template to ensure the rudder horn is symetrical about the hinge line and in line with it, did I say you need to do this before you attach the rudder to the fus, glue the top rudder horn to the newly installed former only, ensure there is sufficient glue inside the hole through the horn, allow to go off, make up another former to go inbetween the two horns and glue in place, allow to set, take the second rudder horn and put tape on the areas you do not wish to get glue on, put lost of microballoon mix into the slot and insert the second horn and bolt through the template into the first horn and check the alignement and that all is square too the rudder, clean the horn and surrounding area with a cotton bud and lighter fluid, you can fix the cover plates if you are using them after the horns are set into position.

Once you have the rudder horns completed you can set out the holes needed to feed the pull pull cables through, I have included a few pic's of how I do it below.

If anyone has any question of feel something is not clear, please ask and I will do what I can to clarify.

Mike