I am getting ready to start my 5 year plan to build the 141"b-29 from ds plans.After looking at them for a while this afternoon,the first question I have is what is with the rudder horn?I understand the hinges .It is a pice of 1/8 wire that runs the lenght of the rudder,thru 2 pivot points made of aluminum or fiberglass or phenelic material inside a plastic tube,do not know why a plastic tube would be used unless to try to cut down friction.but then it shows what looks like a tube over the wire with the rudder horn on it.know the only way this is going to turn that rudder is if that wire is epoxied securly to it.anyone that has built one of these could you please enlighten me a bit on this part of the contruction.Thanks