RE: Pushrod system
NJ: I have been using the Sullivan rods for my most recent builds. One in particular, my Tiger 60, is completely set up using Sullivans for all functions (rudder/nose wheel, elevator, and throttle). The ailerons servo's (two) are in the wings and use direct linkage, so no rods necessary).
The sullivans work great because you can 'snake' them and they are still very slippery so no binding occurs. On the rudder end, thought, I put a 6" length of 2-56 steel wire inside of the rear of the rudder sullivan rod to give it some anti-bend at that point due to torque, and I epoxy the rods to the fuselage formers to prevent bends from torque, but they really are nice and serve the purpose. You have to 'scratch' the surface of the housing before applying epoxy.
Sullivan makes several kinds, depending on needs, including a carbon fiber one which is REAL strong.
DS.